NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-26 T10:22:51 PDT
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For refcode 2008MNRAS.389.1074S:
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NED Abstract

Copyright by Royal Astronomical Society. 2008MNRAS.389.1074S Radio-loud active galactic nuclei and the L_X_-{sigma} relation of galaxy groups and clusters Shen, Shiyin; Kauffmann, Guinevere; von der Linden, Anja; White, Simon D. M.; Best, P. N. 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 active galactic nucleus (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 2, 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. Key words: galaxies: clusters: general, galaxies: jets
Retrieve 318 NED objects in this reference.
Please click here for ADS abstract

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