Osservatorio Astrofisico di Arcetri

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AstroBigné seminars

Lists of bigné's Current season - Previous seasons -- Sign up for a presentation (doodle link)!!!

Last updated by S. di Serego Alighieri, 20 March 2018


Future Astrobigné


Tuesday 17 April 2018 - 11:45 Aula A

Anna Gallazzi [OAA]  (Extragalactic)

Deep spectroscopy of z~1 galaxies with LEGA-C
The Large Early Galaxy Census (LEGA-C) survey is a public spectroscopic survey conducted with VIMOS/VLT that provides deep rest-frame optical spectra for ~3000 massive galaxies at redshift 0.6


Claudio Codella [OAA]  (Star formation)

The GENESIS-SKA project
The recipe to make an habitable planet like our own Earth requires a relatively small rocky planet, at the right distance from the host star, with a not too thick atmosphere rich in volatiles and capable of developing complex organic molecules chemistry. The SKA telescope, and more specifically the GENESIS-SKA project, will allow us to study in detail the evolution of dust as it evolves into planetesimals and rocky planets and to detect heavy complex organic molecules that today are beyond the reach of our observing capabilities.


Gianluca Martelloni [OAA]  (Optical turbulence)

Filtering techniques improve the quality of forecasts of atmospheric parameters applied to the queue-scheduling of ground-based telescopes
We evaluate the impact of Kalman and neural network filtering techniques in enhancing performances and accuracy of atmospheric parameter forecasts applied to the ground-based astronomy. These techniques make use of measurements continuously produced in situ by various instruments in order to better tune the real-time forecast of different parameters which have an impact on the telescope operation.


The Astrobigné concept

Astrobigné is a series of short seminars that are held at the Osservatorio, with the goal of interconnecting the community of people working here, spreading new ideas and results, creating and reinforcing synergies between groups and indiduals. As such, Astrobigne's are meant to be accessible to a broad audience, including astronomers and technology staff, from senior researchers to students. Not by chance, the name "bigné" was chosen to designate something delicious, attractive, quick to grasp and easy to "eat".

In practice, the astrobigne talks:

  • must be short (10 minutes plus 5 for open discussion, strict, 6-8 slides at most)
  • must present only 1-2 key points that people can assimilate quickly
  • should be aimed at triggering later discussions, collaboration, and future activities.
  • at this aim, can also present ongoing work with intermediate results
  • can cover a broad range of topics, including astronomy, technology, historic research, public outreach, organization etc...
  • will NEVER present a general overview of the subject and a complete account of the speaker's work
  • are given in English whenever possible (this is not because we don't love Italian, but we all understand that English is our professional language to be used to foster international collaborations. Not to mention that there usually are non-Italians in the audience).

Astrobigne's take place on Tuesdays, every two weeks in the main auditorium of OAArcetri (Aula A). We usually have three bigne'-talks (10+5minutes each), selected by the organizing committee in order to cover as many different areas of interest as possible. Before the talks, at 11:45, we normally meet in Aula A to socialize and eat real bigne's (pastries!). The talks start at noon approximately, but everybody is strongly advised to come by 11:45 so not to miss the... beginning of the talks!

The Astrobigné Organizing Committee is currently composed of Sperello di Serego Alighieri (reference person for the extragalactic group), Fabrizio Massi (for the planets and star formation group, solar physics area), Alessio Turchi (for the technological area), and Antonella Gasperini (for the library, outreach and history), supported by our director Filippo Mannucci and by the invaluable help of Emanuela Masini with the "real" stuff. If you wish to give a presentation, first contact the relevant reference person and then fill in the doodle!


Past Astrobigné

Season 2017-2018


Tuesday 20 March 2018 - 11:45 Aula A

Francesca Brunetti [OAA]  (Library)

Vedi alla voce "Franco Pacini"
La biblioteca dell'Osservatorio ha recentemente terminato il lavoro di ricerca e di raccolta di tutte le pubblicazioni di Franco Pacini. Presenterò il corpus dell’opera di Pacini disponibile alla consultazione sul portale dei beni culturali dell’INAF “Polvere di Stelle" in occasione dei 50 anni dalla pubblicazione su Nature dell’articolo "Energy Emission from a Neutron Star".

Marco Xompero [OAA]  (Administration)

Nuove linee guida per le assunzioni del personale a tempo determinato
Alcune considerazioni e un tentativo di analisi come spunti di riflessione sugli effetti delle nuove politiche assunzionali del personale a tempo determinato, strutturato e non, del nostro ente.

Rino Bandiera [OAA]  (High energy)

Interplay between physics and geometry in Balmer-line diagnostics of Supernova Remnants
I will show how geometrical effects must be taken into account, in order to make the most of Balmer-line observations as a diagnostic tool of SNR shocks moving in a partially neutral medium.


Tuesday 6 March 2018 - 11:45 Aula A

Leslie Hunt [OAA]  (Extragalactic)

Empowering SKA as a probe of galaxy evolution in HI
I will outline the broader science context of our recently accepted PRIN-SKA proposal, "Empowering SKA as a probe of galaxy evolution with HI (ESKAPE-HI)". There are two main objectives to be accomplished over the two-year duration of the project: the first is to establish baryonic scaling relations for a "local benchmark" based on stellar content, star-formation rate, dust mass, HI, and CO in nearby galaxies. The second is to set the stage for analogous higher-redshift studies by compiling vast multi-wavelength data sets for galaxy populations in the regions likely to be targeted by future SKA surveys. Also touched upon will be the feasibility of our science goals, and how they relate to the SKA precursors and other available HI observational facilities.

Elena Pancino [OAA]  (Stellar evolution)

Multiple stellar populations in globular clusters
I will describe the open problem of multiple populations in globular clusters, how it is currently explained and why the current scenarios do not fully explain the observed properties.


Tuesday 20 February 2018 - 11:45 Aula A

Eleonora Bianchi [UniFI]  (PHD Thesis)

Tracing our chemical origins: deuteration and complex organic molecules in Sun-like protostars
Observations of interstellar complex organic molecules and deuterated species are used to disentangle all the processes at work in the inner 100 AU of a forming Sun-like star and its planetary system. The present measurements contribute to fill in the gap between prestellar cores and protoplanetary disks, showing how the gas chemical content is modified during the early evolutionary stages of a Sun-like star forming region.

Greta Guidi [UniFI]  (PHD Thesis)

From dust to planets: high resolution observations of small-scale structures in evolving protoplanetary disks
In circumstellar disks around young stars the study of the growth and evolution of dust grains is crucial for determining the initial conditions leading to the formation of planets. The development of new observing facilities like ALMA started to unveil a variety of small scale structures in several protoplanetary disks. This indicates that local processes are playing a significant role in the evolution of disks, and that planet formation may be happening at very early stages.


Tuesday 6 February 2018 - 11:45 Aula A

Mirko Curti [UniFI]  (PHD Thesis)

Assessing the chemical evolution of galaxies with large spectral surveys and spatially resolved observations
The study of the chemical evolution of star forming galaxies was done combining the analysis of large samples of local objects from the Sloan Digital Sky Survey with near-infrared, spatially resolved spectroscopy of high-redshift sources obtained from new generation instruments like KMOS on the VLT and LUCI/ARGOS on the LBT. A new approach for gas-phase metallicity determination was based on the analysis of the emission lines in galaxy spectra.

Claudia Toci [UniFI]  (PHD Thesis)

Molecular clouds: magnetohydrodynamics, gravitational collapse and turbulence
Molecular clouds, the coldest and densest part of the Interstellar Medium and the places where stars form, are made by networks of intertwined filaments. The properties of filamentary molecular clouds and cores require a non thermal contribution, given by turbulence or magnetic fields. I will then focus on the properties of perturbations and turbulence during magnetised or non-magnetised collapses.


Tuesday 23 January 2018 - 11:45 Aula A

Luca Bravi [OAA]  (GAIA-ESO)

Unveiling the kinematical and dynamical properties of young open clusters with the Gaia-ESO Survey
The investigation of the dynamical properties of young star clusters play a key role in the study of cluster formation and evolution. High resolution spectroscopic data obtained for a large number of stars in several clusters by the Gaia-ESO Survey allow us to study in details their kinematical properties and probe their dynamical status. Here, I will present the new results obtained for a few clusters observed by GES and discuss about the implications for their dynamical evolution.

Paolo Tozzi [OAA]  (Outreach)

Le nostre Notti sono meglio dei vostri giorni
Open call per la stagione 2018 delle Notti d'Estate ad Arcetri.

Carlo Baffa [OAA]  (Big data)

Giga Tera Peta Data: Are we ready??
This talk aims to start the discussion about how to cope with the incoming deluge of very large data sets and the unexpected problems it poses.


Tuesday 12 December 2017 - 11:45 Aula A

Stefano Sandrelli [INAF]  (Outreach)

Come funzionano la Didattica e la Divulgazione INAF (special seminar in Italian lasting 45-50 minutes)
Come funzionano la Didattica e la Divulgazione INAF? E chi lo sa? E cosa sono? direte voi! Ecco: appunto perche' lo sappiate - e anche per rifletterci meglio insieme - come responsabile delle suddette vi propongo di parlarne insieme.


Tuesday 17 October 2017 - 11:45 Aula A

Emanuele Pace [UniFI]  (Outreach)

The Osservatorio Polifunzionale del Chianti: activity and perspectives
Born by the will of two Chianti Administrations, the "Osservatorio Polifunzionale del Chianti" has rapidly evolved into a structure of the University of Florence carrying out research and outreach activities. This brief seminar will mainly illustrate these activities and the research perspectives with the installation of the new instrumentation planned by the end of 2018.

Luca Olmi [OAA]  (Instrumentation)

Workshop on Toraldo Pupils: Summary Report and Project Status
A workshop on Toraldo Pupils, a super-resolving system for radio astronomy, was held in Arcetri, Villa il Gioiello, on October 12. I will provide a short summary of the workshop and report on the status of project "PuTo".


Tuesday 3 October 2017 - 11:45 Aula A

Edvige Corbelli & Filippo Mannucci [OAArcetri]  (Teaching)

Il Liceo Astronomico di Bagno a Ripoli
Quest'anno parte all'Istituto Gobetti-Volta una sezione del Liceo scientifico con Potenziamento in Astronomia. L'Astronomia diventa materia curriculare con due ore la settimana su 5 anni. Le discipline coinvolte sono diverse, dalle Lettere alla Fisica, dalle Scienze alla Filosofia. Arcetri e UniFi collaborano con l'Istituto per sostenere la cultura astronomica e stimolare la cresciata scientifica dei ragazzi coinvolti nel progetto.

Davide Fedele [OAArcetri]  (Star formation)

ALMA continuum observations of the young protoplanetary system AS 209
I will present new high resolution (~0.15 arcsec) ALMA continuum observations of AS 209, a young (age ~ 0.5 Myr) proto-Sun (M ~ 0.9 Msun) surrounded by a gas- and dust-rich disk. Our ALMA observations reveals the presence of multiple dust gaps. The observations are compared to hydrodynamical simulations of planet-disk interaction. I will discuss the results in the context of disk evolution and planet formation theory.


Tuesday 19 September 2017 - 11:45 Aula A

Simone Bianchi [OAArcetri]  (MA1)

Report on the meeting of Macroarea 1 in Padova on 13 September 2017
We give a brief account of major results from the spliter meeting of Macroarea 1 held in Padova on the afternoon of 13 September 2017.

Francesca Bacciotti [OAArcetri]  (MA2)

Report on the meeting of Macroarea 2 in Padova on 13 September 2017
We give a brief account of major results from the spliter meeting of Macroarea 2 held in Padova on the afternoon of 13 September 2017.

Elena Masciadri [OAArcetri]  (MA5)

Report on the meeting of Macroarea 5 in Padova on 13 September 2017
We give a brief account of major results from the spliter meeting of Macroarea 5 held in Padova on the afternoon of 13 September 2017.

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