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

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

2004-03-10

arxiv.org/abs/astro-ph/0403241v1

Astron.Astrophys. 418 (2004) L21-L25

Astronomy and Astrophysics

Astrophysics

5 pages, 2004, A&A Letters, in press

Scientific paper

10.1051/0004-6361:20040111

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.

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