Details of the mass-temperature relation for clusters of galaxies

Free access article

Issue		A&A Volume 368, Number 3, March IV 2001


Page(s)		749 - 759
Section		Cosmology
DOI		http://dx.doi.org/10.1051/0004-6361:20010080

A&A 368, 749-759 (2001)
DOI: 10.1051/0004-6361:20010080

Details of the mass-temperature relation for clusters of galaxies

A. Finoguenov, T. H. Reiprich and H. Böhringer

Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany

(Received 9 October 2000 / Accepted 20 December 2000 )

Abstract
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.

Key words: galaxies: clusters: general -- cosmology: observations; dark matter; large-scale structure of Universe

Offprint request: A. Finoguenov, alexis@xray.mpe.mpg.de

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