The impact of high pressure cluster environment on the X-ray luminosity of Coma early-type galaxies

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[1] [1,Finoguenov, A.
[2] Miniati, F.
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Finoguenov, A. (alexis@mpe.mpg.de) | 1600年 / EDP Sciences卷 / 418期
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Computer simulation - Correlation methods - Explosions - Galaxies - Kinetic energy - Light scattering - Photons - X ray analysis;
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摘要：
We present an observational study of the LX vs. L Bσ2 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. LBσ2 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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