The Role of Stellar Mass and Star Formation in Shaping X-ray Emission of Radio-Loud and Radio-Quiet AGN

TL;DR

This study explores how stellar mass and star formation influence X-ray emissions in radio-loud and radio-quiet AGN, revealing distinct growth and feedback mechanisms in galaxy evolution.

Contribution

It provides the first detailed comparison of X-ray luminosity, star formation rate, and stellar mass correlations in radio-loud versus radio-quiet AGN.

Findings

RL-AGN show a strong Lx-SFR correlation but no link with M.

RQ-AGN exhibit positive correlations among all parameters.

Radio-loud AGN may suppress star formation in host galaxies.

Abstract

Galaxy evolution and extragalactic astronomy research depend on an understanding of the interactions between active galactic nuclei (AGN) and their host galaxies. We investigate the relationships between X-ray luminosity (Lx), star formation rate (SFR), and stellar mass (M) in distinct samples of radio-loud (RL) and radio-quiet (RQ) AGN. Using data from 4XMM-DR11, SDSS-DR16, and the DESI AGN Host Galaxies VAC, we examine how these key properties correlate within each AGN population. Our analysis reveals different behaviors: RL-AGN show a strong, statistically significant Lx-SFR correlation but no significant link with M, suggesting that accretion and star formation are coupled, possibly independent of host mass. In contrast, RQ-AGN display moderate, significant positive correlations across all parameters, consistent with joint growth driven by a shared cold gas supply.These results suggest that radio-loud AGN might slow down star formation in their galaxies, while radio-quiet AGN seem to grow together with it.