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

Frontiers in Astronomy and Space Sciences

Takashi Okamoto¹  Hikari Shirakata¹  Toshihiro Kawaguchi²  Motohiro Enoki³  Masahiro Nagashima⁴  Masakazu A. R. Kobayashi⁵  Tomoaki Ishiyama⁶  Taira Oogi⁷  Ryu Makiya⁸  Yoshiki Matsuoka⁹ 

[1] Department of Cosmosciences, Graduate School of Science, Hokkaido UniversitySapporo, Japan;Department of Economics, Management and Information Science, Onomichi City UniversityOnomichi, Japan;Faculty of Business Administration, Tokyo Keizai UniversityKokubunji, Japan;Faculty of Education, Bunkyo UniversityKoshigaya, Japan;Faculty of Natural Sciences, National Institute of Technology, Kure CollegeKure, Japan;Institute of Management and Information Technologies, Chiba UniversityChiba, Japan;Kavli Institute for the Physics and Mathematics of the Universe, Todai Institutes for Advanced Study, University of TokyoKashiwa, Japan;Max-Planck-Institut fur AstrophysikGarching, Germany;Research Center for Space and Cosmic Evolution, Ehime UniversityMatsuyama, Japan;

关键词: galaxies;    active galactic nuclei;    bulge;    galaxy formation;    statistics;   

DOI  :  10.3389/fspas.2017.00015

来源: DOAJ

【 摘 要 】

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 z ~ 0. When the mass of the seed is set at 105M⊙, 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 103M⊙ or as randomly chosen value within a 103-5M⊙ 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 z ~ 0 put stronger constraints on the seed BH mass than the relations at higher redshifts.

【 授权许可】

Unknown