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AstroBigné seminars season 2016-2017

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Last updated by S. di Serego Alighieri, 31 Oct. 2017


 

Season 2016-2017


Tuesday 27 June 2017 - 11:45 Aula A

Cécile Favre [OAArcetri]  (Star formation)

Towards the molecular complexity in star-forming regions and proto-planetaty disks
One of the most important questions in molecular astrophysics is how, when, and where complex organic molecules, COMs (≥ 6 atoms) are formed. Thanks to recent progress in radioastronomy instrumentation for both single-dish and millimeter array (e.g. Herschel, NOEMA, ALMA), new results have been obtained. I will present some notable results on the detection of COMs, including prebiotic molecules, towards star forming regions including photo-planetary disks.

Vianney Taquet [OAArcetri]  (Star formation)

PROSPECTS: PRebiotic mOlecules from SPacE to ComeTS
Young low-mass protostars are known to be chemically rich, with the detection of a dozen of interstellar complex organic molecules (COMs). However, it is still unknown whether larger potentially prebiotic molecules, such as glycine, can be formed around young protostars and whether these COMs can survive in the solar nebula. I will present my AstroFIt 2 project that aims to understand the formation and the evolution of interstellar COMs at the origin of the prebiotic chemistry in the inner regions surrounding young low-mass protostars.

Runa Briguglio [OAArcetri]  (Adaptive Optics)

Lost in the Shells - a journey with the E-ELT M4 Adaptive Unit
The M4 Unit is the E-ELT 2.4 m flat deformable mirror, segmented into six thin shells controlled by more than 5000 actuators - now in the final design phase by the Italian consortium AdOptica. INAF is part of the working group with the task of the optical calibration of the system, starting in 2022 (?). On behalf of the team we will present the Season Premiere of a Science-Fiction series on this hot topic.


Tuesday 13 June 2017 - 11:45 Aula A

Sperello di Serego Alighieri [OAArcetri]  (Science communication)

The new digital planetarium for the Fondazione Scienza e Tecnica of Firenze
At the end of June 2017 the Zeiss opto-mechanical machine of the Florence Planetarium will be replaced by a digital system. The parameters leading to the selection of the new system and the possibilities which will be available will be briefly described.

Luca Fini [OAArcetri]  (Software)

The new licensing mechanism for IDL
Starting from IDL vers. 8.6 the licensing mechanism has been modified. This affects mainly the capability to run IDL on a personal laptop when away from Arcetri's LAN. I'll briefly introduce the new features.

Maite Beltran [OAArcetri]  (ESO)

The ESO Users' Committee Meeting 2017
I will summarize the ESO UC meeting that was held in Garching in May and also will discuss the main recommendations made by the Committee to ESO.


Tuesday 30 May 2017 - 11:45 Aula A - Celebrations for the Premio Magini 2016

Elisa Bortolas [OAPadova]  (Premio Magini)

The winning thesis: Dynamics of Massive Black Hole Binaries in Galactic Merger Remnants
The coalescence of supermassive black-hole binaries has been studies through numerical simulations, confirming that most of these objects should melt into a single object within a few Gyr at most.

Marco Romoli [UniFI]  (Premio Magini)

Exploring La Palma Starlight Reserve at Roque de los Muchachos
A bunch of astrophysics students of the University of Florence visited El Roque telescopes to learn how one of the most important observing sites for astrophysics works. They had also the opportunity of spending an observing night at the TNG acquiring data on extragalactic targets, selected by them and later analyzed during the classes of the course Complementi di Astronomia.


Tuesday 16 May 2017 - 11:45 Aula A

Luciamo Miglietta [OAArcetri]  (Logistics)

The new labs in Arcetri
A short update on the work in progress in the new laboratory area is actually due. The activity started in September 2016 and along the way the originally project has changed using all the area for the new lab. A new area for the mechanical workshop is currently under definition.

Carlo Baffa [OAArcetri]  (Teaching)

Hosting secondary school students at Arcetri
With the introduction of mandatory "alternanza Scuola Lavoro" the secondary school students need to attend 200 hours of off-school training or work experience. Thanks the generous collaboration of some of our colleagues, we can cooperate with some schools to use part of this time as an educational and professional guidance for the III and IV year students. This activity is hosted inside the Observatory and we will present some details.

Nicoletta Sanna [OAArcetri]  (Instrumentation)

Giano-B@TNG
Since April 2017 GIANO is finally offered to the community as originally designed: direct feeding without fibers. The incoming light is split by a dichroic to HARPS-N (visible) and GIANO (NIR), allowing the simultaneous use of the 2 high resolution spectrographs. The AOT36 TNG REM Call for Proposals is now open with deadline 19 May 2017.


Tuesday 4 April 2017 - 11:45 Aula A

Luca Del Zanna [Univ. Firenze]  (High Energy) pdf

Fast reconnection in relativistic plasmas
Reconnection in magnetically dominated plasmas is often invoked to explain sudden energy release in many high-energy astrophysics scenarios, though models typically fail to provide the required short timescales. Here we present the first simulations of the tearing instability in the framework of relativistic resistive MHD, leading to explosive events occurring on a few light crossing times of the current sheet length.

Francesca Brunetti [OAArcetri]  (Library) pdf

Scienza di carta: la comunicazione scientifica nei libri per bambini e ragazzi
Tratterò degli editori e delle modalità comunicative dei libri scientifici per bambini e ragazzi e ne discuterò la diffusione. This talk will be in Italian.


Tuesday 21 March 2017 - 11:45 Aula A

Emanuele Nardini [OAArcetri]  (AGN)

Transient iron fluorescence: new clues on the AGN disk/corona?
Our recent discovery of rapid Fe-K variability in the Seyfert galaxy Ark 120 poses several challenges to the commonly adopted X-ray emission paradigm in AGN. I will discuss some possible implications for the structure and properties of the disk/coronal system.

Sperello di Serego Alighieri [OAArcetri]  (Telescopes)

The future of the TNG
I will report on the workshop on "The mission and the scientific perspectives of TNG in the 2020 astrophysics" held in Padova on 1-3 March 2017.


Tuesday 7 March 2017 - 11:45 Aula A

Ang Liu [OAArcetri]  (Extragalactic)

Searching for bulk motions in the intracluster medium of massive, merging clusters with Chandra CCD data
We search for bulk motions in the intracluster medium (ICM) of massive clusters showing evidence of an ongoing or recent major merger with spatially resolved spectroscopy in Chandra data. We find several cases where significant bulk motions are present in the ICM, including the famous Bullet cluster.

Filippo Mannucci [OAArcetri]  (INAF)

News from INAF
The topics discussed during the last meeting of the INAF directors will be presented, especially about the ongoing process to write the new INAF charter. This talk will be in Italian


Tuesday 21 February 2017 - 11:45 Aula A

Guido Risaliti [Univ. of Firenze]  (Extragalactic)

Quasars as standard candles
The non-linear relation between the X-ray and UV luminosity in quasars provides a way to estimate their distances, and to build a Hubble Diagram covering the whole z=0-6 range. This diagram can be used to constrain the cosmological parameters and to test possible deviations from the standard Lambda-CDM model.

Linda Podio [OAArcetri]  (Star Formation)

JWST capabilities and early science
I will briefly recall the JWST instrumentation and capabilities and the timeline and requirements for Early Science proposal submission. Then, I will present a couple of science cases in the field of star formation that will be proposed by the JEDI collaboration (JEts and Disks @Inaf) for the JWST ESR.

Sperello di Serego Alighieri [OAArcetri]  (History of Astronomy)

The reform of the chinese calendar at Galileo's time
The more than 3000 years old chinese calendar will be described, untill its last reform which happened in the first half of the 17th century following the advice of European Jesuit missionaries.


Tuesday 7 February 2017 - 11:45 Aula A

Paolo Tozzi [OAArcetri]  (Outreach)

Our nights are better than your days
The programme for the Notti d'Estate 2017

Alessio Turchi [OAArcetri]  (Software)

Apache Spark: how to stop worrying and love the data
A very short introduction to "Big Data" technologies and map-reduce paradigm. Apache Spark is a powerful tool that expands the map-reduce paradigm and simplifies the parallel aproach to data processing.

Michele Perna [OAArcetri]  (Extragalactic)

Outflow incidence and dependence on AGN luminosity
The connection between the growth of super-massive black holes and the evolution of their host galaxies has been investigated analysing SDSS spectra of a large sample of X-ray detected AGNs. I'll present some results regarding the nature and the fraction of outflowing gas in AGNs, as well as the nuclear conditions possibly at the origin of feedback phenomena.


Tuesday 24 January 2017 - 11:45 Aula A

Luca Fini [OAArcetri]  (Technology)

The recent attack to our mail server
At the beginning of December 2016 our mailserver was practically put down for several days by a massive attack using a legitimate account with stolen password. I will present a brief analysis of what happened and what we could do to avoid it happening again.

Davide Fedele [OAArcetri]  (Planet Formation)

ALMA reveals a new planetary system in the making
I will present new high angular resolution millimeter observations of the young protoplanetary system HD 169142 with ALMA. The data reveal a system made of multiple dust rings and gaps with a substantial drop of the gas density inside the dust gap. The resulting gas and dust surface densities hint at the presence of multiple planets shaping the disk structure via dynamical clearing and dust trapping.

Fabrizio Massi [OAArcetri]  (Telescopes)

TNG is 20 years old: what future?
A workshop on the Telescopio Nazionale Galileo will be held in Padova on March 1-3, 2017. It is intended as a fundamental step towards a major change, introducing new ways of accessing the telescope, new scientific aims, and new rules for proposals.


Tuesday 6 December 2016 - 11:45 Aula A

Francesco Fontani [OAArcetri]  (Star Formation)

The magnetic field drives the fragmentation of massive star-forming clouds into individual stars
I will present ALMA observations at 0.25'' resolution of a very young massive star-forming clump, IRAS 16061-5048c1, which clearly indicate that the clump fragmentation is dominated by the magnetic field, as suggested by theory.

Fabio Rossi [OAArcetri]  (Software)

Introduction to the Jupyter Notebook
It is an application which runs inside your browser, allowing you to create and share documents that contain live code, equations, visualizations and explanatory text, for applications like teaching, data analysis and reporting, experimenting with programming languages, prototyping software.


Tuesday 22 November 2016 - 11:45 Aula A

Marco Padovani [OAArcetri]  (Music & Astronomy)

The Resounding Universe
The immensity of the sky and the sparkling stars have inspired mankind from time immemorial and many scientists were music lovers or even musicians themselves: Galileo, Herschel, Einstein... I will highlight the peculiar and intriguing connection between music and astronomy.

Simone Esposito [OAArcetri]  (Instrumentation)

Next VLT instruments and adaptive optics
We briefly report about two new AO based VLT instruments planned for the VLT UT4 (the UT equipped with deformable secondary and lasers). Arcetri is technically involved in both and has already being allocated ~60 nights of GTO for one of them. Involving astronomers in the exploitations of such instruments is indeed mandatory and we would like to stimulate interests on these projects.


Tuesday 8 November 2016 - 11:45 Aula A

Filippo Mannucci [OAArcetri]  (Instrumentation)

What will we do with MAORY/MICADO?
The first light of the E-ELT high-resolution camera MICADO fed by the AO system MAORY is expected in 2024. The MAORY science working group is starting to collect updated science cases to create a document on the science allowed by the new telescope. I will present the properties of the instrument and present the possibility for everyone of contributing to the process.

Mikkel Stockman [DARK, Copenhagen]  (Extragalactic)

Counting Holes in the Universe: Statistics of Ly-a voids at z~2-4
Using VLT (UVES) and Keck (HIRES) high resolution quasar spectra (R~50.000) in the range 2≤z≤4, we compare the observational number of Lyman-α voids to expectations from recent hydrodynamical simulations by Graziano Rossi et al. (2014).


Tuesday 18 October 2016 - 11:45 Aula A

Matilde Mingozzi [OAArcetri]  (Extragalactic)

Investigating the AGN-starburst connection in a nearby Seyfert galaxy
We have analyzed and modelled the CO emission of a nearby Seyfert galaxy, NGC 34, with the aim of understanding the ISM properties in terms of density, temperature and dominant radiation field. NGC 34 represents a galaxy "prototype", therefore our approach can be seen as a pathfinder for future studies.

Antonella Gasperini [OAArcetri]  (Outreach)

The "Notti d'Estate" 2016
We present a retrospective look at the Notti d’Estate in Arcetri: an overview and some qualitative and quantitative considerations about the public outreach events of the last summer.

Fabrizio Massi [OAArcetri]  (Instrumentation)

Observing with the Sardinia Radio Telescope: a visiting astronomer's account
The Sardinia Radio Telescope has come into operation and an Early Science Programme was run from February 1 to May 31, this year. I spent 3 days observing with the SRT at the end of May in the framework of the programme and this talk will be a brief account of those days from the point of view of a visiting astronomer.


Tuesday 4 October 2016 - 11:45 Aula A

Giovanni Cresci [OAArcetri]  (Seminars)

ANY GIVEN THURSDAY: a survey on general seminars in Arcetri
We briefly review the results of the survey on the Thursday General Seminars, the plans for the new year, as well as some numbers and statistics on the previous seasons.

John Brucato [OAArcetri]  (Solar System)

The Sample Return Mission OSIRIS-REx
OSIRIS-REx was successfully launched into space on 8th September 2016 from Kennedy Space Center. OSIRIS-REx is traveling to Bennu, a carbonaceous asteroid whose regolith may record the earliest history of our Solar System, it will collect and return samples back to Earth seeking answers to the questions that teach us about the history of the Sun and planets and the origin of life on Earth.


 

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AstroBigné seminars season 2015-2016

AstroBigné home - Lists of bigné's Current season Other seasons

Last updated by S.Di Serego, Oct. 6th, 2016


 

Season 2015-2016


 

Tuesday 28 June 2016 - 11:45 Aula A

Fabrizio Massi [OAArcetri]  (Stars)

The meeting of Macroarea 2
I will report on the main results of the meeting of MA2 held in Bologna on 15 and 16 June 2016.

Sperello di Serego Alighieri [OAArcetri]  (Extragalactic)

The meeting of Macroarea 1 I will report on the main results of the meeting of MA1 held in Bologna on 16 and 17 June 2016.

Luca Fini [OAArcetri]  (Technology)

The meeting on Information and Communication Technology
I will report on the main results of the workshop on "What about computing @ INAF?", held in Roma on 20 and 21 June 2016.

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Tuesday 14 June 2016 - 11:45 Aula A

Antonio Pili [OAArcetri]  (High energy)

Quark deconfinement and Long Gamma-Ray Bursts
We investigate the possible implications of quark deconfinement on the phenomenology of Long Gamma-Ray Bursts focusing on the possibility to describe multiple prompt emission phases in the context of the proto-magnetar model. In particular we will discuss the case of the double burst GRB 110709B.

Elena Pancino [OAArcetri]  (Gaia)

Gaia appetizers
I will describe the kind of data that Gaia can provide, and make a few examples of the possibilities that they offer in various areas of astrophysics. This astrobigne' is an appetizer for the 'Gaia days' that are being organized by Germano Sacco in September, when the first official Gaia data release is scheduled.

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Tuesday 31 May 2016 - 11:45 Aula A

Francesca Bacciotti [OAArcetri]  (Star formation)

The feedback of protostellar jets on planet formation
Our recent results from HST and the incoming ALMA images show that jets are launched in the same region and at the same time in which planets are forming. Thus it is mandatory to investigate if, beyond the extraction of excess angular momentum from the accretion disk, jets have a direct feedback on planet formation. In this framework, I will illustrate a new study which shows how the launch of jets may generate dust traps in the disks, where grains can have the time to aggregate in larger bodies.

Nicoletta Sanna [OAArcetri]  (Technology)

GIARPS (GIAno & haRPS-n): the new facility at TNG
GIARPS@TNG is the new system that will allow in 2017 to acquire high-resolution spectra from 0.38 to 2.5 microns simultaneously, combining for the first time two instruments already in use. I will present the project from the GIANO point of view, that in this new configuration will be finally as originally designed: with direct light feeding from the telescope, removing all the problems due to the fibers, like the modal noise and the low efficiency.

Niccolò Bucciantini [OAArcetri]  (High energy)

Polarimetry of pulsar wind nebulae: what X-rays can tell us that Radio and Optical cannot
Synchrotron X-ray emission, due to relativistic charges in strong magnetic field, is the typical electromagnetic signature of high-energy astrophysics. However intensity alone is not very sensitive to the geometry of the magnetic field, hiding us a fundamental information to understand the dynamics of these sources. Yet X-ray polarimetry is still not available today. I will show how, in the specific case of PWNe, it can help us to understand the dynamics, and the role of turbulence in these systems.

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Tuesday 17 May 2016 - 11:45 Aula A

Sara Faggi [OAArcetri]  (Solar System)

First spectrally complete survey of water emission at near-IR wavelengths in comet C/2014 Q2 Lovejoy
We acquired the first comprehensive high resolution spectral survey of comet C/2014 Q2 Lovejoy in the 0.9-2.5 µm range, by observing with GIANO at the TNG. Our observations establish the feasibility of astrobiology-related investigations with future high resolution IR spectrographs on 30-m class telescopes, e.g., the HIRES spectrograph on the E-ELT telescope.

Simone Esposito [OAArcetri]  (Technology)

Call for observing proposals (adaptive and non-adaptive) with LBT, deadline 25 May 2016
This year the LUCI instrument is offered in AO mode. This short talk aims to alert people on such an opportunity and possibly organize offline meetings with the AO group to support applications to LBT within the very short deadline. Observations in commissioning mode with ARGOS (4x4 arcmin FoV) will be discussed as well.

Leslie Hunt [OAArcetri]  (ALMA)

Scientific perspectives for ALMA in Italy
This presentation is an abridged version of an invited review for the SAIt 2016 in Rome that attempts to summarize the INAF perspective of ALMA: where we started, where we are now, and where we want to go.

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Tuesday 3 May 2016 - 11:45 Aula A

Marco Xompero [OAArcetri]  (Technology)

The LATT (Large Aperture Telescope Technology) project
The LATT project takes advantage of two decades of adaptive optics development to demonstrate the concept of a low-weight active primary mirror for space. We developed under ESA contract a 40cm spherical mirror prototype, with an areal density lower than 22kg/m2, with 19 contactless voice coil actuators and co-located capacitive position sensors. It was subjected to thermo-vacuum, vibration and optical tests. We present the background and outcomes of the LATT to explore the concept of lightweight active primary mirrors as building blocks for very large segmented deployable apertures.

David Graham [OAArcetri]  (Solar Physics)

Spectral clues to the nature of chromospheric condensation in solar flares
I will show how IRIS observations of strongly red-shifted UV line profiles are providing new insights into the nature of energy deposition in solar flares.

Luciano Miglietta [OAArcetri]  (Logistics)

New labs in Arcetri for new instruments
The present mechanical workshop in Arcetri is more than 20 years old and is becoming inadequate for the new generation instruments, in which many teams of the Observatory are involved in. The project to transform the current mechanical workshop in a new laboratory will be presented.

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Tuesday 19 April 2016 - 11:45 Aula A

Elena Amato [OAArcetri]  (History of Science)

The Nobel stolen to women
Since 1901, 573 Nobel Prizes have been awarded to a total of 900 Laureates. Only 49 of these are women: 4.5 %. If we focus on Physics, out of 200 Nobel prize winners only 2 are women: 1 %. Is it particularly difficult for women to reach levels of excellence in Physics? In reality among the Physics laureates there should probably be at least 6-7 more Nobelwomen...

Mauro Focardi [OAArcetri]  (Exoplanets)

Towards a statistical description of planets and exoplanetary atmospheres: the ARIEL space mission
ARIEL (Atmospheric Remote-sensing Infrared Exoplanets Large-survey) has been proposed as a medium-class mission competing for the ESA M4 launch opportunity in the context of the 2015-2025 Cosmic Vision program. It has been conceived by an European Consortium as the first space mission to extensively perform remote-sensing on the atmospheres of a well defined set of warm and hot exoplanets.. ARIEL will observe a large number (~500) of gas giants, Neptunes and super-Earths around a variety of host stars exploiting transit spectroscopy in the 2-8 μm spectral range and broad-band optical photometry. Its Payload design is based on the successful study of the M3 EChO (Exoplanets Characterisation Observatory) mission with several simplifications and mass reductions.

Alessio Turchi [OAArcetri]  (Technology)

Operational forecast of atmospheric parameters at Mt. Graham: ongoing validation of model performances
We present an ongoing validation of the Astro-Meso-NH model performances in order to show the accuracy of the forecasts of atmospheric parameters at the ground level (dome) of LBT telescope site.

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Tuesday 5 April 2016 - 11:45 Aula A

Simone Bianchi [OAArcetri]  (History of Astronomy)

Tempel the astronomer meets Nietzsche the philosopher
An account of the few known facts about the visit to Arcetri of the German philosopher Friedrich Wilhelm Nietzsche in November 1885.

Elisabeta Lusso [OAArcetri]  (Extragalactic)

A universal physical relation for quasars
I will discuss our current knowledge of the relation between the soft X-ray and the optical/ultraviolet emission in AGN from an observational perspective. Such relation is of fundamental importance in understanding the structure of AGN accretion discs and their interplay with the mysterious X-ray corona.

Elena Masciadri [OAArcetri]  (Technology)

ALTA Center: Advanced LBT Turbulence and Atmosphere Center
The ALTA project aims to set-up an automatic operational system for the forecast of the atmospherical parameters relevant for the ground-based astronomy and the optical turbulence to support AO observations at LBT. Commissioning is scheduled in June and December 2016.

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Tuesday 15 March 2016 - 11:45 Aula A

Germano Sacco [OAArcetri]  (Galactic)

Structure and age of the young cluster NGC 2264 from the Gaia-ESO Survey
The mechanism leading to the formation of star clusters from the contraction and fragmentation of molecular clouds is the subject of much debate. One of the goal of the Gaia-ESO Survey is to analyse the spatial structure, the kinematics and the star formation history of star clusters younger than 10 Myr to address this debate. I will present some results from the analysis of the Gaia-ESO observations of the young cluster NGC2264, which show that we are able to reconstruct important details on the star formation process of this cluster and fulfill our original goal.

Linda Podio [OAArcetri]  (Astrochemistry)

The workshop on "Astronomical Complex Organic Molecules in different environments"
I will report on the first italian workshop on astrochemistry held at Palazzo Strozzi on 10 and 11 March 2016 and organized jointly by the Arcetri Observatory and the Scuola Normale Superiore of Pisa.

Sperello di Serego Alighieri [OAArcetri]  (Polarimetry)

The conventions for the polarization angle
The IAU/IEEE convention is that the polarization angle increases counter-clockwise, looking at the source. After WMAP the CMB polarimetrists use the opposite convention, causing problems and misunderstandings. Should we all stick to the same convention?

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Tuesday 1st March 2016 - 11:45 Aula A

Vasaant Krishnan [OAArcetri]  (Star Formation)

Mapping the Milky Way with the Australian Long Baseline Array
For the first time, we have used the Australian Long Baseline Array (LBA) to measure the parallax distances to 6.7 GHz methanol masers in the Milky Way Galaxy. I will be discussing how these inaugural results from the only Southern hemisphere VLBI instrument are being incorporated into the Bar and Spiral Structure Legacy (BeSSeL) survey to map the Milky Way galaxy.

Rino Bandiera [OAArcetri]  (High energy)

Synchrotron emission with a partly random field & models of Radio Supernova Remnants
We present an extension of the classical synchrotron theory, for the combination of an ordered magnetic field plus a random component. Exact analytical formulae are obtained for a power-law distribution of particles. These results are then applied to model structure and polarization of the radio emission from shell-type Supernova Remnants.

Pietro Bolli [OAArcetri]  (Technology)

An Unmanned Aerial Vehicle-based system for the characterization/calibration of Low Frequency Aperture Arrays
I will give an overview of the technical characteristics of the Low Frequency Aperture Array (LFAA) of SKA. Then, I will describe the two Italian demonstrators, called Medicina and Sardinia Array Demonstrators, designed for testing new devices and concepts developed by INAF for a possible installation in SKA-LFAA. One of these systems is a custom hexacopter equipped with RF instrumentation able to characterize the antenna/array far-field pattern and to calibrate the array in the real operative environment.

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Tuesday 9th February 2016 - 11:45 Aula A

Davide Fedele [OAArcetri]  (Star Formation)

Reservoirs of Water in Planet Forming Disks
Water is a key species for the physical and chemical evolution of protoplanetary disks. I will breifly review our current understanding of the water formation and abundance distribution in disks and the connection to the delivery of water on Earth.

Paolo Tozzi [OAArcetri]  (Extragalactic)

Waiting for Astro-H: bulk motions in the Intra Cluster Medium of massive clusters observed with Chandra
In February 2016, the Japanese satellite Astro-H will be launched.  Astro-H is expected to provide, for the first time, high resolution X-ray spectra from an X-ray bolometer, allowing one to measure the dynamic status of the Intra Cluster Medium (ICM), including bulk motions and the turbulent velocity field.  In the meanwhile, we investigated the ICM dynamics with CCD, X-ray spectra exploiting the exquisite angular resolution of Chandra, finding evidence for bulk motions of the order of few thousands of km/s in a few massive, merging clusters.

Renzo Nesti [OAArcetri]  (Technology)

On the development of the passive front-end for the SRT focal plane array Q-Band receiver
I will describe design aspects concerning the passive devices of the receiver front-end of the 19-pixels Q-band focal-plane-array for SRT. While the receiver is still under development, the passive front-end part of that receiver has been recently completed and I'll be able to show results about Electromagnetic modeling, fabrication and tests.

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Tuesday 26th January 2016 - 11:45 Aula A

Claudia Toci [OAArcetri/UniFI]  (Star Formation)

Gravitational collapse: Magnetohydrodynamics and turbulence
I will discuss preliminary results of the accelerated contracting box model, a possible tool to study the evolution of turbulence in a gravitational collapse.

Mirko Curti [OAArcetri/UniFI]  (Extragalactic)

New empirical calibrations for strong line metallicity indicators
I will discuss a method aimed at providing new calibrations for some of the most widely used strong-line metallicity diagnostics, based on the uniform application of the direct method for abundances estimation.

Eleonora Bianchi [OAArcetri/UniFI]  (Planet & Star Formation)

H2CO and CH3OH deuteration towards SVS 13 A
I will report the detection of highly deuterated formaldehyde and methanol around the Class I protostar SVS 13 A, in the framework of the ASAI 30 m large program.

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Tuesday 15th December 2015 - 11:45 Aula A

Francesca Brunetti [OAArcetri]  (Library)

Want articles anywhere and anytime? IDEM can help you!
Arcetri Library provides its users the possiblility to access subscribed scientific information anywhere and anytime. Through IDEM (Identity Management per l'accesso federato), it is possible. We will show you how to get an IDEM account and then how to access our subscribed journal articles outside of the Observatory anytime using the IDEM credentials.

Daniele Galli [OAArcetri]  (History of Astronomy)

The first spectrum of a comet
I will illustrate some historical documents and instruments that will be on display at the exhibition "Starlight: the birth of astrophysics in Florence" (March 21 - June 21, 2016). In particular, I will show that the birth of astrophysics in Florence is due to an astronomer from Pisa.

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Tuesday 24th November 2015 - 11:45 Aula A

Giacomo Venturi [OAArcetri]  (Extragalactic)

MAGNUM survey: investigating 10 local active galaxies with the integral field eye of MUSE
I'll give an overview of the MAGNUM survey, a collection of ten local active galaxies observed with the integral field spectrograph MUSE at VLT, presenting the results of the analysis performed up to now, which is limited to two objects: NGC 5643 and NGC 1365

Greta Guidi [OAArcetri]  (Planet & Star Formation)

Dust properties across the CO snowline in the HD 163296 disk from ALMA and VLA observations
Looking for evidence of grain growth by ice condensation around the young intermediate-mass star HD 163296.

Simone Bianchi [OAArcetri]  (History of Science)

Meet the gang!
After a brief introduction to the new collection of busts in the Library, I'll narrate the story of the bust of Giovan Battista Donati (1826-1873), founder of the Arcetri Observatory.

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Tuesday 17th November 2015 - 11:45 Aula A

Paolo Tozzi [OAArcetri]  (SciFi!)

Aliens and Dyson spheres or How to publish funny things and end up on the front page

Francesco Palla [OAArcetri]  (Stars&Star Formation)

A close look at pulsating stars in Upper Scorpius with Kepler-2

Antonella Gasperini [OAArcetri]  (History of Science)

Starlight : la nascita dell’astrofisica in Italia
“Starlight” is a national historical exhibition located in five Italian observatories which will be inaugurated next March.

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Tuesday 27th October 2015 - 11:45 Aula A

Aldo Dell'Oro [OAArcetri]  (Solar System)

Minor Planets from the Gaia point of view
Gaia is not just about stars and galaxies, but also a great deal of new data about Minor Bodies of our Solar System.

Luca Fini [OAArcetri]  (Technology)

Improving Performances of Parallel Programs. I.e.: How to Avoid Performance Degradation
While measuring performances of parallel programs on multicore servers we noticed a large variability in execution time of both a real-world application and a simple parallel oriented benchmark. We discuss the effects of the optimization strategies implemented in the Linux kernel to exploit the capabilities of multi-cpu/multi-core architectures and their penalizing effect on the performances of some typical cpu-intensive parallel applications. And we also suggest some simple solutions to obtain full performances on such applications.

Tino Oliva [OAArcetri]  (Technology)

Updates on the MOONS instrument for the VLT

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Tuesday 13th October 2015 - 11:45 Aula A

Francesco Palla [OAArcetri]  (Outreach)

Astronomy from Four Perspectives - The Heraeus project
Con il corso su “The Birth of Stars and Planetary Systems” che si terra’ a Firenze nel mese di agosto 2016 si conclude il primo ciclo del progetto finanziato dalla Fondazione Heraeus destinato a studenti di fisica e docenti del liceo che coinvolge, oltre l’Osservatorio di Arcetri, le Universita’ di Firenze, Heidelberg e Jena. Faro’ un breve resoconto di quanto fatto sinora e quello che si potrebbe fare in futuro.

Niccolò Bucciantini [OAArcetri] (High Energy)

The Secret life of the Snail
With two long structures protruding from its head, and a large structured body resulting from its long evolutionary history, the Snail is a unique "best" that allows us to investigate a peculiar stage in the evolution of its class. I will present the recent result of a multi-wavelength observational campaign.

Luca Carbonaro[OAArcetri] (Public Outreach)

Behind the scenes of a peculiar outreach night - Astronomy for visual impaired people

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Tuesday 29th September 2015 - 11:45 Aula A

Luca Olmi [OAArcetri] (Technology)

Can we beat the diffraction limit? (or can we achieve super-resolution?)
I will briefly introduce the so-called super-resolution techniques, which could in principle overcome the classical diffraction limit. In particular, I will describe optical techniques based on the "Toraldo Pupils", introduced by Prof. Giuliano Toraldo di Francia in the early '50s.

Sperello di Serego Alighieri [OAArcetri] (Extragalactic)

The workshop on "Cosmic Polarization Rotation - from Galilean Principles to Cosmology"
I will briefly report on the workshop held at Villa Il Gioiello on 7-8 September 2015.

Paolo Tozzi [OAArcetri] (Public Outreach)

Outreach in Arcetri: "Notti d'Estate 2015"

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AstroBigné seminars season 2014-2015

AstroBigné home - Lists of bigné's Current season Other seasons

Last updated by S. Zibetti, Sept. 18th, 2015


Tuesday 30th June 2015 - 11:45 Aula A
Luca Del Zanna [ASAP (UniFi)] (High Energy)
Alfven waves in the expanding solar wind
The (fast) solar wind turbulent plasma is dominated by Alfvenic fluctuations propagating away from the Sun, with physical properties depending on the heliocentric distance. Here I will discuss the fate of (monochromatic) Alfven waves in such expanding environment via numerical MHD simulations.

 

Simone Landi [ASAP (UniFi)] (High Energy)
“Ideal”-magnetic reconnection in Magnethydrodynamics: implications for explosive phenomena in Astrophysical plasmas
On how non-ideal instabilities can trigger explosive phenomena in ideal time scales: the “ideal” tearing mode.

 

Stefano Carniani (Extragalactic)
Fast outflows quenching star formation at high redshift
Negative feedback from accreting black holes is considered a fundamental physical process in galaxy evolution. It is indeed to provide the link between the growth of supermassive black holes and their host galaxies. The [OIII]λ5007 line emission is a good tracer of outflows and ionized gas dynamics in the narrow-line regions of AGN. I will present VLT-SINFONI near-IR integral field spectra of five quasar at redshift z=2.4. The kinematical analysis of the [OIII] line shows complex gas kinematics in a region of several kpc from the location of the AGN, with blue shifted velocities of a few hundreds of km/s and line widths up to 1500 km/s. [OIII] emission likely traces a massive outflow with a conical morphology. Furthermore we detect the presence of faint, narrow (< 200 km/s) [OIII] emission anti correlated with the presence of the fast blue shifted [OIII]. Overall, our data are consistent with a picture in which narrow [OIII] emission traces star forming gas in the host galaxy, which is absent in the conical outflows, as expected when fast outflows quench star formation. This scenario is confirmed by the observations of the Ha emission, tracing star formation in the host galaxy, which is strongly suppressed in the outflows region. Finally, I will present AGN feedback model to describe the ionized gas dynamic and the properties of outflows.

 

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Tuesday 16th June 2015 - 11:45 Aula A
Sperello di Serego Alighieri
Fiat Lux
Highlights from the Conference "Fiat Lux" held in Rome on June 3-5, 2015

 

Edvige Corbelli (Extragalactic)
IGM@50 Is the Intergalactic Medium Driving Star Formation?
Highlights from the conference held in Spineto June 8th-12th, 2015

 

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Tuesday 5th May 2015 - 11:45 Aula A
Elena Masciadri (Techno)
Forecasts of the OT as a support to the ground-based astronomy supported by AO facilities: state of art at Arcetri
In this contribution I will briefly present the state of art of the studies and projects we are carrying on in Arcetri in the context of the forecast of the optical turbulence and atmospherical parameters conceived as a tool to support the ground-based astronomy particularly that assisted by the AO. With ALTA and MOSE we are going towards the setting-up of automatic operational systems for LBT, VLT and the E-ELT. With STARMET we are investigating, in collaboration with LaMMA, the possibility to set-up in Florence an advanced center for the OT forecasts at different top-class telescopes in the world.

 

Giovanni Morlino (High Energy)
Effect of mass loading in bow shock nebulae
Bow shock pulsar wind nebulae show highly non-smooth tail structures in Hα, radio and X-rays. We investigate the long term dynamics of the bow shock nebulae created by pulsars moving supersonically through partially ionized interstellar medium. Ionization of neutrals penetrating into the pulsar wind tail and the resulting mass loading changes dramatically the flow dynamics of a light leptonic pulsar wind. The photo-ionization by the UV light produced enough massloading to strongly affect the tail flow. Using a quasi 1-D approximation, we find that mass loading leads to the fast expansion of the pulsar wind tail, making the tail flow intrinsically non-stationary. The resulting shapes of pulsar bow shock nebulae, in Hα radio and X-rays, compare favorably with observations.

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Tuesday 21st April 2015 - 11:45 Aula A
Sperello di Serego (General physics & astrophysics)
The Equivalence Principle from Galileo to Einstein
I will briefly discuss the historical and conceptual evolution of the equivalence principle from Galileo (involving just moving bodies and implying the equivalence of gravitational and inertial mass) to Einstein (involving also electrodynamics and constituting the foundation of General Relativity).

 

Runa Briguglio (Techno)
E-ELT M4 on the go: optical test of the Demonstration Prototype
The M4 is the deformable mirror for the european ELT and has just enter the MAIT phase (manufacturing, integration and test), led by the italian consortium AdOptica. The M4 is a system composed by a 2.6 m diameter monolithic reference plate, 6 thin glass shells, 5316 actuators providing 1 kHz, 100um stroke for the high order adaptive correction. A Demonstration Prototype (M4DP) with two sub-shells has been assembled to allow the verification of the technological updates (with respect to the LBT and VLT mirrors) and of the functioning and testing procedures for the M4. The M4DP was optically calibrated at INAF Merate by a working group led by Arcetri: the optical test allowed to flatten, align and co-phase the shells at the requested 20 nm RMS Wavefront accuracy; also, specific procedures for the M4 calibration were tested. In this AstroBignè presentation I will summarize the optical test activity on the M4DP, looking forward to start again on the M4.

 

Francesco Fontani (Star Formation)
Deuterated molecules as unexpected chemical tracers for shocks
The process of deuterium enrichment in molecules from the main reservoir HD is initiated in molecular clouds by exothermic gas-phase reactions. For this reason, deuterated molecules have long been used as tracers of the coldens and densest portions of molecular clouds. Although this general framework remains true, the story is not so simple. Based on the results recently obtained with mm interferometers (PdBI and ALMA), I will show observational evidence that deuterated molecules are also excellent tracers of recently shocked regions (i.e. regions in a completely different physical regime), under peculiar circumstances.

 

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Tuesday 31 March 2015 - 11:45 Aula A
Riccardo Cesaroni (Star Formation)
New Light from HII Regions
Ionized regions around early-type stars are believed to be well known objects, but surprises are still possible. In this short presentation I will describe an unexpected result that was obtained from the comparison of the radio and IR emission of young HII regions and will explain how such a finding might shed (new) light on the O-B star formation process itself.

 

Francesco Palla et al.
Astrofrontiere 2015
A report of the recent "general assembly" of INAF about the future of astrophysics in Italy. After the intro by Francesco Palla, open time for reports by other participants and discussion.

 

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Tuesday 10th March 2015 - 11:45 Aula A
Marco Bocchio (Extragalactic)
Dust Processing and Evolution in Extreme Environments
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Antonio Pili (High Energy)
Twisted Magnetosphere in General Relativistic Neutron Stars
The phenomenology of the emission of magnetars supports the idea that their magnetosphere are tightly twisted in the vicinity of the star. We will discuss the properties of equilibrium models of magnetized neutron stars endowed with a twisted magnetosphere obtained solving the general relativistic Grad–Shafranov equation, both in the interior and in the exterior of the star.

 

Paolo Tozzi (Extragalactic)
A revised cool core-starburst connection (and the Phoenix cluster)
Recent results on the cool cores and possible cooling flows in the center of massive galaxy clusters are presented. We argue that, in several cases, the star formation observed in the central galaxy (BCG) is not directly associated to the putative cooling flow. We also report the results from the deep XMM observation of the Phoenix cluster, the largest cooling-flow candidate observed so far.

 

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Tuesday 24th February 2015 - 11:45 Aula A
Francesco Palla
Exciting news from the European Astronomical Society pdf

 

Carmelo Arcidiacono (Technology/Solar System)
Spatially resolved M-band emission from Io’s Loki Patera - Fizeau imaging at the 22.8 meter LBT pdf
At the interferometric Focus of the Large Binocular Telescope (LBT) we imaged Io detecting strong M-band (4.8µm) thermal emission arising from Loki Patera. The 22.8-meter baseline of the provides the highest angular resolution yet obtained for ground based observations at this mid-infrared wavelength: ∼32 milliarcseconds (∼100 km at Io) resolving the Loki Patera emission into two distinct maxima originating from different regions within Loki’s horseshoe lava lake...

 

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Tuesday 10th February 2015 - 11:45 Aula A
Lorenzo Busoni (Techno)
A day with LUCI: a short-movie about struggle for life at the LBT
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Antonella Gasperini (Outreach)
The astroBID : preserving and sharing the Italian astronomical heritage  (Note: seminar in Italian!)pdf

 

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Tuesday 27th January 2015 - 11:45 Aula A
Anna Gallazzi (Extragalactic)
Element abundance ratios and star formation quenching: satellite versus central galaxies pdf
Galaxies' star formation can be affected by the environment in which they live. To understand the extent to which this happens we confront the age and element abundance ratios (indicative of star formation timescale) of galaxies that are accreted as satellites onto a group/cluster with those of galaxies residing at the center of their dark matter halo.

 

Fabrizio Massi (Planets & Star Formation)
Star-forming structures in Giant Molecular Clouds: core networks, bubbles, and filaments in the Vela Molecular Ridge
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Carlo Baffa, Elisabetta Giani (Technology)
Origami: development of a massively parallel module for SKA Pulsar Search Instrument pdf
One of the key scientific projects of the Square Kilometre Array (SKA) radio telescope is a large survey for searching pulsars both in isolated and in binary systems. The data analysis must be performed in real time with an input data rate which is expected to reach 0.6TeraSamples/sec. This problem is well suited for a massively parallel computing engine, but the dimensions of SKA bring this challenge to a new level of difficulty. Here at Arcetri we have finalized the developement of a highly optimized module for GPUs and the implementation on other massively parallel architecture is under study.

 

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Tuesday 13th January 2015 - 11:45 Aula A
Linda Podio (Planets & Star Formation)
Disk Chemistry with ALMA
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Andrea Verdini (Solar Physics)
Turbulence in expanding media
Turbulence causes plasma heating in many astrophysical systems that usually have peculiar inhomogeneities, like expansion, contraction, rotation. Their effect is commonly neglected in numerical simulations of turbulence because of the limited resolution currently achievable. The Expanding Box Model is an approximation that overcomes this difficulty for system in spherical expansion/contraction. I will present an application to the (expanding) solar wind, highlight differences with homogenous turbulence, and discuss possible applications to other expanding/contracting media.

 

Luca Fini (Technology/Administrative)
La procedura automatica per gli acquisti (Note: this seminar will be in Italian due to the topic being specific to Italian administration and bureaucracy)
Una breve illustrazione delle procedure web-based sviluppate per le pratiche di acquisto di beni e servizi da parte dell'Osservatorio.

 

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Tuesday 16th December 2014 - 11:45 Aula A
Gianna Cauzzi (Solar physics)
Solar flares and the F-CHROMA project pdf
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Gian Paolo Tozzi (Comets)
Rosetta's adventure to comet 67P/CG pdf
After 10 years and a travel of about 6 billions of Km, last August the Rosetta spacecraft entered in orbit (non Keplerian) around the comet 67P/CG. Rosetta started then a global mapping and studying of the comet, followed by the the released of the lander Philae. Unfortunately, because of thecnical problems, the lander jumped back and reached a crater with vary small illumination. In the talk I'll give the last news and results obtained so far by the orbiter and the lander.

 

Edvige Corbelli (Education & Outreach)
Licei @ Arcetri o Arcetri @ Licei? pdf
Possibili rimedi alla scomparsa dell'astrofisica nei licei

 

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Tuesday 21st October 2014 - 11:45 Aula A
Joana Santos (Extragalactic)
The reversal of the SF–density relation in a massive, X-ray selected galaxy cluster at z=1.58: results from Herschel
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Celia Blain (Technology)
RAVEN, a MOAO demonstrator for the Subaru Telescope
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Nicoletta Sanna (Technology)
GIANO, the HR-NIR spectrometer made in Arcetri, is now available at TNG
GIANO is the high-resolution near infrared (0.95-2.45 micron) spectrometer mounted at TNG and it is now offered to the users for the first time (2015A call for proposals).I will briefly show the main instrument characteristics and performances for a proper GIANO proposal preparation.

 

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Tuesday 7th October 2014 - 11:45 Aula A
Francesco Palla (Star Formation)
The beat of young stars: how asteroseismology reveals stellar ages
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Stefano Zibetti (Extragalactic)
The second public data release of the CALIFA Survey
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Francesco Tribioli (Technology)
I nuovi server dell'OAA
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Tuesday 16th September 2014 - 11:45 Aula A
Niccolò Bucciantini (High Energy)
IXPE - Imaging X-Ray Polarimetry Explorer
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Tommaso Mazzoni (Technology)
Implementation of SLODAR atmospheric turbulence profiling to the ARGOS system
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Edvige Corbelli (Extragalactic)
Galaxy masses: far out in space and back in time
Rotation curves are useful tools for measuring galaxy masses and test cosmological models. The degeneracy between the baryonic and dark matter content can be alleviated by tracing the curve very far out and reconstructing the stellar mass via synthesis models. I will outline the latest results and the work in progress on M33 and other nearby low luminosity galaxies.

 

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 The MEGA (Meetings ExtraGalactic of Arcetri) is a series of informal Seminars about extragalactic topics held at Arcetri, mostly on Wednesdays.

Indeed they are more informal than the official Arcetri Seminars series, participants are welcome to interrupt with comments and questions, and speakers are invited to talk about on-going work, in order to get constructive comments and to foster local collaborations.

Last updated by S. di Serego Alighieri, 16 November 2017


 

Future MEGA

Please contact Sperello di Serego Alighieri (e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.  Tel.: 0039 055 2752311) to propose a MEGA.


 

List of past MEGA

4 October 2017: Frederic V. Hessman,"Measuring DM properties in spiral galaxies using stellar dynamics"

21 June 2017: Christofer Haines,"Following the evolution of the star-forming galaxy population to z~1 with 100,000 spectra"

26 April 2017: Beta Lusso,"AGNfitter: a Monte Carlo approach to fit SEDs of AGN and galaxies"

22 February 2017:Omar Nasim,"Spirals Abound, Spirals Unfound"

29 June 2016:Viola Allevato,"Clustering properties of AGN at different scales, redshifts and luminosities"

15 June 2016:Toshio Fukushima,"Rotation Curve of M33 Explained by Disc Dark Matter"

17 June 2015:Giulia Savorgnan,"Galaxy vivisection: black hole and host bulge affair"

22 April 2015:Sebastain Sanchez, "Ionized gas in the CALIFA galaxies"

8 April 2015:Jamie Farnes,"Probing Magnetic Fields throughout the Universe"

24 February 2015:Francesco Tombesi,"AGN feedback from accretion winds"

11 February 2015: Guido Risaliti,"A Hubble Diagram for Quasars"

23 January 2015: Enrica Bellocchi,"2D kinematic characterization of a representative sample of local (U)LIRGs: a 'kinemetry' analysis based on VIMOS/VLT Intergal Field Spectroscopy"

22 December 2014: Federico Lelli, "Starbursts and Gas Dynamics in Dwarf Galaxies"

22 October 2014: Enrico Pinna, Lorenzo Busoni, Tino Oliva and Simone Esposito, "Shark, Argos, MOONS and ERIS: Arcetri involvment in next generation instruments at VLT and LBT"

17 September 2014Peter Camps, "The radiative transfer code SKIRT and its applications to observed and simulated galaxies"

9 July 2014Francesca Onori, "Looking for the broad emission lines in AGN2 with deep NIR spectroscopy and the measure of the mass of Intermediate Mass" BH"

30 May 2014:  Vasiliki Petropoulou, "The 'WALL' large-scale structure in the COSMOS field. Exploring the onset of environment-driven trends at z=0.73"

14 May 2014:  Fernando Buitrago, "Stellar haloes of Early-Type massive galaxies at z~0.7 or how to use the HUDF for local Universe studies"

2 April 2014:  Anna Gallazzi & Stefano Zibetti, Report on the ESO Workshop about "3D2014: Gas and stars in galaxies: A multi-wavelength 3D perspective"

20 November 2013:  Leslie Hunt & Simone Bianchi, "Herschel highlights on large-scale galactic structure and nearby galaxies"

19 September 2013:  Kimihiko Nakajima, "Ionization States of galaxies: Evolution, SFR-M_star-Z Dependence, and Ionizing Photon Escape"

14 June 2013:  Evan Kirby, "The Universal Mass-Metallicity Relation for Dwarf Galaxies"

29 May 2013:  Bernhard Brando, "Zooming in on Starbursts"

15 May 2013:  Paulina Lira, "Black Hole mass and growth at high-z"

8 May 2013:  Marco Bocchio, "Dust destruction and heating in the IGM"

19 April 2013:  Francesco Massaro, "Unveiling the nature of the unidentified gamma-ray sources: blazar counterparts at low radio frequencies"

27 February 2013:  Ingyin Zaw, "The Host Active Galactic Nuclei of Extragalactic Water Masers"

6 February 2013:  Stefano Carniani, "ALMA observations of a strongly star-forming merging system at z = 4.7"

30 January 2013:  Giulia Savorgnan, "Supermassive black holes and host galaxies - The recovery of the M_BH - n relation"

16 January 2013:  Guido Risaliti, "Unambiguous tests of general relativistic effects in AGNs with NuSTAR and XMM-Newton"

24 October 2012:  Sperello di Serego Alighieri, "The cold Interstellar Medium in Virgo Early-Type Galaxies"

5 June 2012:  Laura Magrini, "Scaling relations of metallicity, stellar mass, and star formation rate in metal-poor starbursts: II Models"

23 May 2012:  Leslie Hunt, "Scaling relations of metallicity, stellar mass, and star formation rate in metal-poor starbursts: I Observations"

21 December 2011:  Silvio Lorenzoni, "Reionizzazione e Lyman-Break galaxies a z=8-9"

14 June 2011:  Stefano Zibetti, "Resolved optical-infrared SEDs of galaxies: universal relations and their break-down on local scales"

31 May 2011:  Hagai Netzer, "The earliest growth of the most massive black holes: the active z=4.8 universe"

8 April 2011:  Filippo Frontera, "Laue lens development for deep gamma-ray observations of celestial objects"

23 December 2010:  Emanuele Daddi, "New insights on the nature of massive galaxies in the distant Universe"

13 October 2010:  Eleonora Sani, "The Spitzer/IRAC view of black-hole/bulge scaling relations"

16 June 2010:  Guido Risaliti, "[OIII] Equivalent Width and Orientation Effects in Quasars"

20 May 2010:  Sperello di Serego Alighieri,"Cosmological birefringence: an astrophysical test of fundamental physics"

28 April 2010:  Daniel Kunth, "The Lyman-alpha escape fraction of local and cosmological star forming galaxies"

24 March 2010:  Filippo Mannucci, "Una relazione tra metallicita', SFR e massa per le galassie"

20 January 2010:  Guido Risaliti, "AGN outflows and feedback"

12 November 2009:  Carlos Hernandez Monteagudo, "The Large Angle Radio-Cosmic Microwave Background Cross-Correlation: what we expect and what we actually find"

21 October 2009:  Eleonora Sani, "Enhanced Star Formation in Narrow Line Seyfert 1 AGN revealed by Spitzer"

1 October 2008:  George Helou, "Unbiased Infrared Spectroscopic Surveys"

16 September 2008:  Hiroyuki Hirashita, "Far-Infrared Observations of Blue Compact Dwarf Galaxies by AKARI: Dust Properties in Metal-Poor Environments"

25 June 2008:  Raffaella Schneider, "The transition from PopIII to PopII stars"

1 April 2008:  Marco Grossi, "The gas accretion rate in M33 from the population of HI clouds"

7 November 2007:  Alessandro Marconi, "Estimating BH masses from 0 to high redshift"

5 October 2007:  Guido Risaliti, "X-ray variability: a tool to investigate the structure of the innermost regions of AGNs"

19 September 2007:  Dan Maoz, "Low-luminosity AGNs: their accretion mode and potential as persistent energy feedback sources"

11 July 2007:  Sperello di Serego Alighieri, "Il contenuto di idrogeno neutro nelle galassie early-type"

11 April 2007:  Simone Bianchi, "Polvere nelle Supernovae"

14 mar. 2007:  Marco Salvati, "Proprieta' nei raggi X delle sorgenti radio piu' luminose"

14 February 2007:  Eleonora Sani & Emanuele Nardini, "Applicazione e sviluppo di diagnostici in infrarosso: come rilevare la fonte energetica nelle ULIRG e nelle loro controparti lontane"

17 january 2007:  Filippo Mannucci, "Perche' le galassie ellittiche nei cluster producono piu' supernovae che quelle di campo?"

14 December 2006: First meeting to discuss the format