SEMINÁRIO DO DEPARTAMENTO DE ASTRONOMIA
Supermassive Black Holes: From the First Billion Years to the Present Era
a talk by Drª. Thaisa Storchi Bergmann (Instituto de Física - UFRGS) - In-Person
Abstract:
Supermassive Black Holes (SMBH) inhabit the nuclei of most – if not all, massive galaxies (>10 9 M Sun ). Models of galaxy evolution attribute a fundamental role to their feedback in quenching star formation when they are in the Active Galactic Nuclei (AGN) phase. I will present studies from our group showing that the kinetic feedback from AGN ionized gas outflows in the near Universe falls short of that required in the models. But that a recent JWST observations of our Cycle 1 project shows strong feedback in the warm molecular gas, that indicates that the feedback must be looked for in this gas phase as well. I will also discuss another recent result from our group: an increased Star Formation Rate (SFR) in AGN host galaxies relative to a control sample of non-active galaxies, which is at odds with the idea that AGN quench star formation. Finally, I will discuss the implications of recent JWST results, from the first billion years of the Universe that show: more AGN than expected, with SMBH masses up to ~100 times higher relative to that of their host galaxies than in the near Universe; spectra of the most distant and red AGN show a high incidence of very young starbursts, similarly to what we have been finding in the present-day Universe.
Short-Bio:
Dr. Storchi-Bergmann is a professor and advisor of graduate studies at the Physics Institute of Universidade Federal do Rio Grande do Sul. She is member of the Brazilian Academy of Sciences, the World Academy of Sciences TWAS, and category 1A researcher at CNPq. She is a recipient of the L’Oreal/UNESCO For Women in Science award and of the National (Brazil) Medal of Scientific Merit, for her work in the study of Supermassive Black Holes in galaxies.
Homepage: www.if.ufrgs.br/~thaisa
Instagram: astrofisica_thaisa
Facebook: Astrofisica Thaisa Storchi Bergmann
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Livro: MyNews Explica Buracos Negros
Google Meet: https://meet.google.com/pcw-gmem-jyi
Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live
