Nuclear/Circumnuclear Starbursts and Active Galactic Nuclei Mass Accretion in Seyfert Galaxies

TL;DR

This study explores the relationship between starburst activity near the centers of Seyfert galaxies and the activity of their active galactic nuclei, revealing that closer starbursts have a stronger influence on AGN accretion.

Contribution

It provides new evidence that nuclear starbursts closer to AGNs are more strongly linked to AGN luminosity and accretion, highlighting the importance of starburst proximity.

Findings

Nuclear and circumnuclear starburst luminosities are positively correlated with AGN luminosity.

Nuclear starbursts show a stronger correlation with normalized AGN luminosity than circumnuclear starbursts.

Starbursts nearer to the AGN may significantly influence AGN mass accretion.

Abstract

We investigated the correlation between nuclear/circumnuclear starbursts around the active galactic nuclei (AGNs) and the AGN activities for 43 Seyfert galaxies in the CfA and 12 micron samples. We found that circumnuclear starburst luminosity as well as nuclear starburst luminosity are positively correlated with AGN luminosity. Moreover, nuclear starburst luminosity is more strongly correlated with the AGN luminosity normalized with AGN Eddington luminosity than is circumnuclear starburst luminosity. This implies that starbursts nearer the AGN could have a greater effect on AGN mass accretion. We also discuss these results from the viewpoint of the radiation effects from starbursts and sequential starbursts.