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Astro Seminar

Feeding supermassive black holes by SN driven shells

Speaker: Jan Palouš (Astronomical Institute of the Czech Academy of Sciences (Prague))
Date: Tuesday 27 February 2024
Time: 16:00
Venue: N3.28/Zoom

The Active Galactic Nuclei (AGNs) and Starburst Galaxies are compared to the central part of the Milky Way known as the Central Molecular Zone. We discuss the formation and evolution of the galactic nuclei and we explore the possibility of feeding the Super Massive Black Holes (SMBHs) in galactic centers by expanding supernova remnants. We use the numerical simulations in homogeneous and in the inhomogeneous turbulent medium showing that the supernovae occuring at specific places near the galaxy rotational axis can feed the central accretion disk surrounding the SMBH. The mass deposited into the central parsec by individual supernovae varies between 10 and 1000 solar masses per one supernova depending on the position of SN relative to the rotation plane of the galaxy and on the density of the ambient medium. Supernovae occuring in the aftermath of a starburst event near the galactic center can supply 10^3 - 10^6 Msun into the central parsec within 30 Myrs. The fate of that mass splits between the growth of the SMBH and outflow from the nuclear disk. The research is in cooperation with Barnabas Barna, Soňa Ehlerová, Mark R. Morris, Pierre Vermot, and Richard Wünsch.