Frontiers in Astronomy and Space Sciences (Sep 2017)

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

  • Hikari Shirakata,
  • Toshihiro Kawaguchi,
  • Takashi Okamoto,
  • Tomoaki Ishiyama

DOI
https://doi.org/10.3389/fspas.2017.00013
Journal volume & issue
Vol. 4

Abstract

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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 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 Martín-Navarro et al. (2016). We tested the model with weak AGN feedback and find that galaxies with larger velocity dispersion have a younger stellar age.

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