Radio loud AGN and the L_X - σrelation of galaxy groups and clusters

Abstract

We use the ROSAT All-Sky Survey to study the X-ray properties of a sample of 625 groups and clusters of galaxies selected from the Sloan Digital Sky Survey. We stack clusters with similar velocity dispersions and investigate whether their average X-ray luminosities and surface brightness profiles vary with the radio activity level of their central galaxies. We find that at a given value of $\sigma$, clusters with a central radio AGN have more concentrated X-ray surface brightness profiles, larger central galaxy masses, and higher X-ray luminosities than clusters with radio-quiet central galaxies. The enhancement in X-ray luminosity is more than a factor of two, is detected with better than 6$\sigma$ significance, and cannot be explained by X-ray emission from the radio AGN itself. This difference is largely due to a subpopulation of radio-quiet, high velocity dispersion clusters with low mass central galaxies. These clusters are underluminous at X-ray wavelengths when compared to otherwise similar clusters where the central galaxy is radio-loud, more massive, or both.

Section 5.2 is updated, more discussion on the dependence of L_X - σrelation on the stellar mass of BCGs

References in corpus (4)

• How special are Brightest Group and Cluster Galaxies?
• On the prevalence of radio-loud AGN in brightest cluster galaxies: implications for AGN heating of cooling flows
• Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
• The nature of the ghost cavity in the NGC 741 group

Cited by in corpus (6)

• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• CALIFA: a diameter-selected sample for an integral field spectroscopy galaxy survey
• COMP2CAT: hunting compact double radio sources in the local Universe
• Measuring the X-ray luminosities of DESI groups from eROSITA Final Equatorial-Depth Survey: I. X-ray luminosity -- halo mass scaling relation
• Smaller stellar disc scale lengths in rich environments
• The Compactness of Galaxy Groups in the Sloan Digital Sky Survey