X‐Ray Spectral Properties of the Cluster Abell 2029
Craig L. SarazinDepartment of Astronomy, University of Virginia, P.O. Box 3818, Charlottesville, VA 22903-0818M. W. WiseCenter for Space Research, Massachusetts Institute of Technology, Building 37-644, Cambridge, MA 02139Maxim MarkevitchHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138
1998en
ABI
Аннотация
We have analyzed ASCA and ROSAT PSPC spectra and images of the galaxy cluster Abell 2029. The ASCA spectra of the cluster indicate that the gas temperature declines with radius. The PSPC image shows that the cluster is very regular and smooth. Also, there is no signicant evidence for any irregularities in the temperature distribution in the cluster, as would be produced by a subcluster merger. These results suggest that A2029 is a relaxed cluster and that the gas is in hydrostatic equilibrium. We use the assumption of equilibrium to determine the gravitational mass of the cluster as a function of radius. At a radius of 16@ (1.92 Mpc ; km s~1 Mpc~1), the gravitational mass is
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