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=4

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=<p>We use a semi-analytic model of galaxy formation and investigate how the mass of a seed black hole affect the scaling relation between black hole mass and bulge mass at <italic>z</italic> ~ 0. When the mass of the seed is set at 10<sup>5</sup><italic>M</italic><sub>⊙</sub>, we find that the model results become inconsistent with recent observational results of the scaling relation for dwarf galaxies. On the other hand, when we set seed black hole mass as 10<sup>3</sup><italic>M</italic><sub>⊙</sub> or as randomly chosen value within a <inline-formula><mml:math id="M3" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mn>1</mml:mn><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>-</mml:mo><mml:mn>5</mml:mn></mml:mrow></mml:msup><mml:msub><mml:mrow><mml:mi>M</mml:mi></mml:mrow><mml:mrow><mml:mo>⊙</mml:mo></mml:mrow></mml:msub></mml:math></inline-formula> range, we find the results are consistent with observational results including the dispersion. We also find that black hole mass—bulge mass relations for less massive bulges at <italic>z</italic> ~ 0 put stronger constraints on the seed BH mass than the relations at higher redshifts.</p>