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Title:
Formation and evolution of X-ray clusters - A hydrodynamic simulation of the intracluster medium
Authors:
Evrard, August E.
Affiliation:
AA(California, University, Berkeley)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 10, 1990, p. 349-366. Research supported by the University of California and NSF. (ApJ Homepage)
Publication Date:
11/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmology, Galactic Clusters, Galactic Evolution, Interstellar Gas, X Ray Sources, Brightness Distribution, Dark Matter, Hydrodynamics, Many Body Problem, Universe
DOI:
10.1086/169350
Bibliographic Code:
1990ApJ...363..349E

Abstract

The thermodynamic history of the hot intracluster medium in a cluster of Coma richness was examined using a numerical simulation incorporating three-dimensional hydrodynamics of a collisional baryonic component within a self-consistently evolving dark matter mass distribution. The model evolves to states at low redshifts whose X-ray and 'optical' properties are strikingly similar to Coma and A2256. The elliptical X-ray isophotes seen at z = 0 are remnants of a merger event which occurred at z = 0.2; thus, Coma and A2256 probably suffered moderate merger events in the recent past. The model also indicates that clusters of Coma richness should display a Suniaev-Zel'dovich central decrement of about 0.5 mK.

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