AUTHOR=Shirakata Hikari , Kawaguchi Toshihiro , Okamoto Takashi , Makiya Ryu , Ishiyama Tomoaki , Matsuoka Yoshiki , Nagashima Masahiro , Enoki Motohiro , Oogi Taira , Kobayashi Masakazu A. R. 

TITLE=Theoretical Re-evaluations of Scaling Relations between SMBHs and Their Host Galaxies—1. Effect of Seed BH Mass

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 4 - 2017

YEAR=2017

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2017.00015

DOI=10.3389/fspas.2017.00015

ISSN=2296-987X

ABSTRACT=We explore the effect of varying the mass of a seed black hole on the resulting black hole mass -- bulge mass relation at $z \sim 0$, using a semi-analytic model of galaxy formation combined with large cosmological N-body simulations. When the mass of the seed is set at $10^5 M_\odot$, we find that the model results become inconsistent with recent observational results of the black hole mass -- bulge mass relation for dwarf galaxies. On the other hand, when we employ seed black holes of $10^3 M_\odot$ or select their mass randomly within a $10^{3 -5} M_\odot$ range, the resulting relation is consistent with observational results including the dispersion. We also find that black hole mass -- bulge mass relations for less massive bulges at $z \sim 0$ put stronger constraints on the seed BH mass than the relations at higher redshifts.