Supermassive Black Hole Mass Regulated by Host Galaxy Morphology

TL;DR

This study reveals that supermassive black hole mass correlates strongly with host galaxy morphology, with elliptical galaxies hosting more massive black holes than disk galaxies, influenced by radiation drag mechanisms.

Contribution

It demonstrates the regulation of SMBH mass by host galaxy morphology, integrating observational data with the radiation drag model for SMBH growth.

Findings

Elliptical galaxies host more massive SMBHs than disk galaxies.

SMBH mass in disk galaxies is suppressed despite increasing starburst luminosity.

Host galaxy morphology significantly influences SMBH growth.

Abstract

We investigated the relationship between supermassive black hole (SMBH) mass and host starburst luminosity in Seyfert galaxies and Palomar-Green QSOs, focusing on the host galaxy morphology. Host starburst luminosity was derived from the 11.3 micron polycyclic aromatic hydrocarbon luminosity. We found that the SMBH masses of elliptical-dominated host galaxies are more massive than those of disk-dominated host galaxies statistically. We also found that the SMBH masses of disk-dominated host galaxies seem to be suppressed even under increasing starburst luminosity. These findings imply that final SMBH mass is strongly regulated by host galaxy morphology. This can be understood by considering the radiation drag model as the SMBH growth mechanism, taking into account the radiation efficiency of the host galaxy.