Black Hole Starvation and Bulge Evolution in a Milky Way-like Galaxy
Silvia Bonoli, Lucio Mayer, Stelios Kazantzidis, Piero Madau, Jillian, Bellovary, Fabio Governato

TL;DR
This study uses a new hydrodynamical simulation to explore the growth of a supermassive black hole and its impact on galaxy evolution, highlighting merger-driven black hole growth and limited AGN feedback effects.
Contribution
Introduces the ErisBH simulation, modeling black hole formation, growth, and feedback in a Milky Way-like galaxy with detailed analysis of its effects.
Findings
Black hole growth mainly through mergers, minimal gas accretion.
AGN feedback has limited impact on the galaxy's central regions.
Formation of a strong bar and a box/peanut bulge morphology.
Abstract
We present a new zoom-in hydrodynamical simulation, "Erisbh", which follows the cosmological evolution and feedback effects of a supermassive black hole at the center of a Milky Way-type galaxy. ErisBH shares the same initial conditions, resolution, recipes of gas cooling, star formation and feedback, as the close Milky Way-analog "Eris", but it also includes prescriptions for the formation, growth and feedback of supermassive black holes. We find that the galaxy's central black hole grows mainly through mergers with other black holes coming from infalling satellite galaxies. The growth by gas accretion is minimal because very little gas reaches the sub-kiloparsec scales. The final black hole is, at z=0, about 2.6 million solar masses and it sits closely to the position of SgrA* on the MBH-MBulge and MBH-sigma planes, in a location consistent with what observed for pseudobulges. Given…
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