NIHAO XXII: Introducing black hole formation, accretion and feedback into the NIHAO simulation suite
arXiv:1906.06955 · doi:10.1093/mnras/stz1688
Abstract
We introduce algorithms for black hole physics, i.e., black hole formation, accretion and feedback, into the NIHAO (Numerical Investigation of a Hundred Astrophysical Objects) project of galaxy simulations. This enables us to study high mass, elliptical galaxies, where feedback from the central black hole is generally thought to have a significant effect on their evolution. We furthermore extend the NIHAO suite by 45 simulations that encompass halo masses from to , and resimulate five galaxies from the original NIHAO sample with black hole physics, which have halo masses from to . Now NIHAO contains 144 different galaxies and thus has the largest sample of zoom-in simulations of galaxies, spanning halo masses from to . In this paper we focus on testing the algorithms and calibrating their free parameters against the stellar mass versus halo mass relation and the black hole mass versus stellar mass relation. We also investigate the scatter of these relations, which we find is a decreasing function with time and thus in agreement with observations. For our fiducial choice of parameters we successfully quench star formation in objects above a halo mass of , thus transforming them into red and dead galaxies.
arXiv comment14 pages, 11 figures, accepted by MNRAS
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