Details of the mass--temperature relation for clusters of galaxies

Details Details of the mass--temperature relation for clusters of galaxies Details of the mass--temperature relation for clusters of galaxies

2000-10-10

arxiv.org/abs/astro-ph/0010190v3

Astron.Astrophys.368:749-759,2001

Astronomy and Astrophysics

Astrophysics

12 pages, A&A 2001 in press

Scientific paper

10.1051/0004-6361:20010080

We present results on the total mass and temperature determination using two samples of clusters of galaxies. One sample is constructed with emphasis on the completeness of the sample, while the advantage of the other is the use of the temperature profiles, derived with ASCA. We obtain remarkably similar fits to the M-T relation for both samples, with the normalization and the slope significantly different from both prediction of self-similar collapse and hydrodynamical simulations. We discuss the origin of these discrepancies and also combine the X-ray mass with velocity dispersion measurements to provide a comparison with high-resolution dark matter simulations. Finally, we discuss the importance of a cluster formation epoch in the observed M-T relation.

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