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Osservatorio Astrofisico di Arcetri

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 Nicoletta Sanna (Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo., reference person for the galactic group), Antonino Marasco (Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo., for the extragalactic group), and Paola di Ninni (Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo. for the technological area), supported by our director Maria Sofia Randich and by the invaluable help of Emanuela Masini with the "real" stuff.


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 here 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!

UPDATE: due to the COVID-19 outbreak, Astrobigne's are now held remotely via Google Meet at meet.google.com/wet-ivsv-axp. But do not worry, real bigne's will be back soon!


 Next Astrobigné: 8th Jun 2021

Speaker: Francesco Salvestrini - The impact of AGN activity on the host-galaxy ISM

Local Seyfert galaxies are the perfect laboratories to study whether and to what extent the emission from the Active Galactic Nuclei (AGN) affects the properties of the host-galaxy interstellar medium (ISM). This can be achieved through a multi-wavelength strategy, which allows us to fully characterise the sources in terms of AGN activity and host-galaxy properties (e.g., star formation rate, galaxy stellar mass, different gas phases).
In this work, we focused our attention on a sample of mid-IR selected Seyfert galaxies in the local Universe, which benefits from an extensive data coverage. In particular, we performed a systematic study of their nuclear activity through broad-band X-ray spectral analysis, necessary to unveil the intrinsic AGN luminosity and the level of obscuration. Exploiting mm observations (from ALMA and APEX), we characterised the host-galaxies in terms of the molecular gas component.

Archive of past Astrobigné