The Impact of High Pressure Cluster Environment on the X-ray Luminosity of Coma Early-type Galaxies

Abstract

We present an observational study of the Lx vs Lb sigma^2 relation for early-type galaxies in the Coma cluster based on the XMM-Newton survey data. Compared to a similar relation for a sample dominated by field early-type galaxies, the Coma cluster galaxies show a flatter slope. Our calculations show that adiabatic compression produces a flattening in the Lx vs Lb sigma^2 relation that is in remarkable agreement with the observed effect. Our scenario is further supported by the observed compactness of the X-ray emission of Coma galaxies.

arXiv comment5 pages, 2004, A&A Letters, in press

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Cited by in corpus (7)

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• The Two-dimensional XMM-Newton Group Survey: z<0.012 groups
• The X-ray luminosity function of galaxies in the Coma cluster
• X-ray active galactic nuclei in the core of the Perseus cluster
• Chandra X-ray Observations of Galaxies in an Off-Center Region of the Coma Cluster