the impact of the AGN and the torus properties on the evolution of spiral galaxies

TL;DR

This paper explores how AGN activity and torus properties influence the morphological evolution of spiral galaxies, highlighting the role of black hole mass, gas dynamics, and star formation rates in galaxy evolution.

Contribution

It introduces a new model linking AGN luminosity with black hole mass and physical parameters of the galaxy, providing insights into galaxy evolution mechanisms.

Findings

AGN luminosity depends on black hole mass and spiral arm density.

Star formation rate is positively correlated with AGN luminosity.

Physical properties of the torus influence galaxy evolutionary paths.

Abstract

For spiral galaxies, the active galactic nucleus (AGN) and some physical parameters that concern the host galaxy such as spiral arm radius and density can play an important role in the morphological evolution of these galaxies. Considering the gravitational effect of the central black hole as a feeding mechanism, the gas flows from spiral arms to the accretion disk. Accordingly, we constructed our approach and derived an equation for the AGN luminosity that depends on parameters such as the black hole mass and the spiral arm density. The galaxy samples were taken from a catalog of type 1 AGN from SDSS-DR7. In our model, we present the relation between the AGN luminosity and the black hole mass depending on the above physical parameters. We also investigated the relation between the black hole mass and the star formation rate for the galaxy sample. The physical properties of the torus, such as the spiral arm radius, density, the torus length, and the gas mass, and the star formation rate, were explained in terms of the variation of the AGN luminosity. These properties are more effective in the evolutionary scenario of the spiral galaxy. Relative to the variation of the AGN luminosity, the evolutionary track is different based quantitatively on the star formation rate. In which the variation in the star formation rate is positively correlated with the AGN luminosity.