Chemical evolution of Seyfert galaxies

TL;DR

This study models the chemical evolution of Seyfert galaxy bulges, incorporating updated Galactic potential and black hole feedback, successfully reproducing observed relations and abundance patterns.

Contribution

It introduces an updated chemical evolution model for Seyfert galaxy bulges that accounts for black hole feedback and reproduces key observed relations.

Findings

Reproduces the BH mass-bulge mass relation.

Matches observed peak nuclear luminosities.

Achieves observed metal overabundances and abundance constancy with redshift.

Abstract

We computed the chemical evolution of Seyfert galaxies, residing in spiral bulges, based on an updated model for the Milky Way bulge with updated calculations of the Galactic potential and of the feedback from the central supermassive black hole (BH) in a spherical approximation. We followed the evolution of bulges of masses $2\times 10^{9}-10^{11}M_{\odot}$ by scaling the star-formation efficiency and the bulge scalelenght as in the inverse-wind scenario for ellipticals. We successfully reproduced the observed relation between the BH mass and that of the host bulge, and the observed peak nuclear bolometric luminosity. The observed metal overabundances are easily achieved, as well as the constancy of chemical abundances with the redshift.