Volume 418, Number 1, April IV 2004
|Page(s)||L21 - L25|
|Published online||02 April 2004|
Letter to the Editor
The impact of high pressure cluster environment on the X-ray luminosity of Coma early-type galaxies
Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany e-mail: email@example.com
2 Space Research Institute, Profsoyuznaya 84/32, Moscow, 117810, Russia
3 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741, Garching, Germany e-mail: firstname.lastname@example.org
Corresponding author: A. Finoguenov, email@example.com
Accepted: 10 March 2004
We present an observational study of the LX vs. 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. 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.
Key words: clusters: individual: Coma / X-rays: galaxies / X-rays: ISM
© ESO, 2004
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