Issue |
A&A
Volume 418, Number 1, April IV 2004
|
|
---|---|---|
Page(s) | L21 - L25 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20040111 | |
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
1
Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany e-mail: alexis@mpe.mpg.de
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: fm@mpa-garching.mpg.de
Corresponding author: A. Finoguenov, alexis@mpe.mpg.de
Received:
29
January
2004
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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