Theoretical Re-evaluations of Scaling Relations between SMBHs and Their Host Galaxies–2. Importance of AGN Feedback Suggested by Stellar Age–Velocity Dispersion Relation

Frontiers in Astronomy and Space Sciences

Shirakata, Hikari¹  Okamoto, Takashi¹  Kawaguchi, Toshihiro²  Ishiyama, Tomoaki³ 

[1] Department of Cosmosciences, Graduate School of Science, Hokkaido University, Sapporo, Japan;Department of Economics, Management and Information Science, Onomichi City University, Onomichi, Hiroshima, Japan;Institute of Management and Information Technologies, Chiba University, Chiba, Japan

关键词: Active Galactic Nuclei (AGN);    galaxy formation;    Galaxy evolution;    statistics;    galaxy age;   

DOI  :  10.3389/fspas.2017.00013

学科分类：空间科学

来源: Frontiers

【 摘 要 】

We present the galactic stellar age -- velocity dispersion relation obtained from a semi-analytic model of galaxy formation. We divide galaxies into two populations: galaxies which have over-massive/under-massive black holes (BHs) against the best-fitting BH mass -- velocity dispersion relation. We find that \textcolor{red}{galaxies with larger velocity dispersion have older stellar ages. We also find that} galaxies with over-massive BHs have older stellar ages. These results are consistent with observational results obtained from Martin-Navarro et al. (2016). \textcolor{red}{We tested the model with weak AGN feedback and find that galaxies with larger velocity dispersion have a younger stellar age.}.

【 授权许可】

CC BY