Arcetri Astrophysical Observatory

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AstroBigné seminars

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

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The Astrobigné Organizing Committee is currently composed of Crescenzo Tortora (This email address is being protected from spambots. You need JavaScript enabled to view it. , reference person for the extragalactic group), Laura Inno (This email address is being protected from spambots. You need JavaScript enabled to view it. , for the planets and star formation group, solar physics area), and Alessio Turchi (This email address is being protected from spambots. You need JavaScript enabled to view it. , for the technological area), supported by our director Maria Sofia Randich and by the invaluable help of Emanuela Masini with the "real" stuff.


Future Astrobigné


Tuesday 15 January 2019 - 11:45 Aula A

Niccolò Tomei [UniFI]  (PHD)

Mean-field dynamo in relativistic disks accreting onto rotating black holes

Mean field dynamo is one of the best candidates in amplifying magnetic fields in AGNs. I will present some general aspects about GRMHD dynamo and a simple model which tries to explain some observations related to SGR A* emission

Guido Agapito [OAA]  (Technology)

SOUL: upgrading the SCAO system at the Large Binocular Telescope
We present the commissioning status of SOUL: the Single conjugated adaptive Optics Upgrade for LBT. SOUL upgrades the wavefront sensors replacing the existing CCD detector with an EMCCD camera and the rest of the system in order to improve sky coverage, contrast and SR. The left focal stations, LBTI SX and LUCI1, have been already upgraded, the first on-sky PSFs have been taken in October and LBTI SX has been released for science. We have verified that AO performance is in good agreement with the expected values and science verification will be done in the next months. Integration of LBTI DX is started few days ago and LUCI2 will be upgraded during the summer shutdown.


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 two 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, but everybody is strongly advised to come by 11:45 so not to miss the... beginning of the talks!


Past Astrobigné

Season 2018-2019


Tuesday 18 December 2018 - 11:45 Aula A

Monica Rainer [OAA]  (Software)

GOFIO or how to personalize a data reduction pipeline
GOFIO is the reduction software for the infrared GIANO-B spectrograph and it is the result of a close cooperation with the various scientific groups interested in the instrument. As such it is highly customizable, and in continuous evolution. I will focus on the importance of interacting with the astronomical community when providing data reduction softwares.

Jacopo Soldateschi [UniFI]  (PHD)

The Hitchhiker’s Guide to Gravity: Scalar-Tensor Theories in Neutron Stars as an Extension of Einstein’s Legacy
The General Theory of Relativity might not be the definitive theory of gravity. Scalar-tensor theories of gravity can extend Einstein’s theory to account for some of the most outstanding problems in physics. We study, by means of numerical simulations, the effects brought by these theories in the case of the most extreme material objects in the universe: neutron stars.


Tuesday 4 December 2018 - 11:45 Aula A

Maria Angela Corazzi [UniFI]  (PHD)

Photoprocessing of formamide ice: route towards prebiotic chemistry in space
Formamide was first detected in gas phase in Orion-KL and SgrB2. It is the simplest molecule containing the peptide linkage and the chemical reactions of molecules like formamide are considered a plausible pathway for synthesis of biomolecules under prebiotic conditions. In laboratory, we studied formamide under simulated space conditions.

Andrea Sacchi [UniFI]  (PHD)

Tidal Disruption "Failure": the effects of a stellar counter-rotation on a tidal disruption event
A tidal disruption event is the violent rupture of a star passing too close to a supermassive black hole. We found out that an initial retrograde rotation (with respect to the orbital angular momentum) could prevent the disruption of the star. Through hydrodynamical simulations we investigate the observational prospects of such an event.

Mathieu van der Swaelmen [OAA]  (Stellar populations)

Alpha-elements over the first kpc of the Large Magellanic Cloud
The Large Magallenic Cloud (LMC) is one of the closest galaxies interacting with the Milky Way. The LMC exhibits a bar like structure at its center, which is embedded in an old stellar disc. In order to investigate the relation between the bar and the disc and the chemical evolution of the LMC, we performed a detailed chemical tagging of 250 LMC field giant stars observed in three fields over the first kiloparsecs.


Tuesday 20 November 2018 - 11:45 Aula A

Juraj Kojs [Univ. of Miami]  (Music)

Sonoric traces
The musician, composer, and performer Juraj Kojs, director of the Foundation for Emerging Technologies and teacher at the University “Frost School of Music" in Miami (Florida, USA), will tell us about his innovative way to produce music (“sonoric traces”), inspired by an environment. He would also like to know from us what our activity is about, as a source of inspiration.


Tuesday 23 October 2018 - 11:45 Aula A

Carlo Baffa [OAA]  (Outreach)

Alternanza scuola lavoro - un investimento per il futuro
Riportiamo la soddisfacente esperienza dell'alternanza scuola lavoro, che ha dato un ottimo esito e chiamiamo a raccolta nuovi volontari per questa iniziativa che sembra essere un buon investimento per il futuro.

Stefano Zibetti [OAA]  (Extragalactic)

"Birth, life and fate of massive galaxies and their central beating heart"
We will report on the Conference on "Birth, life and fate of massive galaxies and their central beating heart" hel on 3-7 September 2018 in Favignana.


Tuesday 25 September 2018 - 11:45 Aula A

Alessandra Zanazzi [OAA]  (Outreach)

The Astrotourism Project in Florence
I will present a pilot project by INAF and the Arcetri Observatory, aiming at promoting an astro-tourism programme in Florence and its surroundings. This initiative aims at searching a new cultural format exploiting synergies between art and science and working in cooperation with local Institutions. We will promote itineraries including astronomical monuments, relevant places and museums in the Florence area through guidebooks, maps, guided tours. The visitors will discover the sky in the renowned monuments, but also along unconventional paths and outside the mainstream of mass tourism.

Francesca Bacciotti [OAA]  (Star formation)

Polarimetry of protoplanetary disks with ALMA: new clues on the dust properties
Polarimetric data of Class II rotating disk/jet systems were obtained with ALMA with the aim of determining the magnetic field configuration. The observed properties, however, support dust self-scattering as the origin of the polarization. In this case polarimetry gives access to information on the dust properties which complement the results obtainable from unpolarized emission. This can to be of great interest in studies of the evolution of protoplanetary disks.

Massimo Mazzoni & Fabrizio Mazzucconi [OAA]  (Outreach)

A real All-stars game: the Olympic Games of Astronomy
Whilst the role of Astronomy, in the ministerial programs for high-school, has become in the years similar to that of Cinderella, the Italian scientific community is making continuous efforts to promote the students' interest in the starry sky. In this task, SAIt and INAF are at the forefront. Special lectures, winter training courses and then summer stages, regional and national selections are aimed to develop in those young minds a real appreciation for science in general, also through a healthy and friendly competition. At the end, a selected small group is supported to reach Countries beyond the edge of the usual maps (Kyrgyzstan; Wei-Hai, China; Colombus, Sry Lanka) and to do its best there. And, often, their score is not that bad (including recently one gold medal e two brass medals).



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