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Issue A&A
Volume 369, Number 1, April I 2001
Page(s) 36 - 41
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20010094



A&A 369, 36-41 (2001)
DOI: 10.1051/0004-6361:20010094

The temperature-mass relation in magnetized galaxy clusters

K. Dolag1, A. Evrard2 and M. Bartelmann1

1  Max-Planck-Institut für Astrophysik, PO Box 1317, 85741 Garching, Germany
2  Dept. of Physics, University of Michigan, Ann Arbor, MI 48109-1120, USA

(Received 9 June 2000 / Accepted 9 January 2001 )

Abstract
We use cosmological, magneto-hydrodynamic simulations of galaxy clusters to quantify the dynamical importance of magnetic fields in these clusters. The set-up of initial magnetic field strengths at high redshifts is chosen such that observed Faraday-rotation measurements in low-redshift clusters are well reproduced in the simulations. We compute the radial profiles of the intracluster gas temperature and of the thermal and magnetic pressure in a set of clusters simulated in the framework of an Einstein-de Sitter and a low-density, spatially-flat CDM cosmological model. We find that, for a realistic range of initial magnetic field strengths, the temperature of the intracluster gas changes by less than $\approx$5%


Key words: magnetic fields, galaxies: clusters: general

Offprint request: K. Dolag, kdolag@ibm-2.mpa-garching.mpg.de




© ESO 2001


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