Connecting Cosmic Gas Flows and Metal Enrichment to Supermassive Black Hole Growth in Galactic Evolution

Nicole Sanchez (University of Washington)
Tuesday, November 23, 2021 - 11:00am to 12:00pm

In this talk, I will discuss the impact of supermassive black hole (SMBH) feedback on the gas phase evolution of Milky Way-mass (MW-mass) galaxies. Both my simulation suites were created with the N-body+Smoothed particle hydrodynamics code, ChaNGa, and include a 25 Mpc cosmological volume, Romulus25, and a suite of "genetically modified" (GM) galaxies. These GM galaxies originate from nearly identical initial conditions resulting in minor modifications to their accretion histories that maintain the large scale structure and final main halo mass of the original simulation. Exploring the MW-mass galaxies from these combined simulation suites, we find that (1) the SMBH propagates metals from the disk out into CGM, (2) how much metal is retained in the ISM (and CGM) depends on the SMBH's deviation from the M-sigma relation, and (3) black hole accretion histories can be influenced by larger-scale galaxy accretion physics, which work in tandem to quench star formation.

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