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Session 37 - Clusters of Galaxies - X-Rays.
Display session, Tuesday, January 14
Metropolitan Ballroom,

[37.09] The Observed Structure and Evolution of X-ray Clusters in a CHDM Universe

C. Loken, A. Klypin, J. Burns (NMSU)

We present results concerning the structure and evolution of X-ray clusters, as would be observed from the current epoch, in the high-resolution, cosmological simulation of a CHDM universe with 2 neutrinos by Bryan amp; Norman (1997). The intrinsic cluster X-ray luminosity function exhibits a slight positive evolution while the cluster temperature function evolves negatively; both of these results are consistent with theoretical predictions which assume purely adiabatic gas physics. The evolution of individual clusters is followed in order to construct merger histories and estimate merger rates. Radial variations in the X-ray cluster centroid and position angle are studied in order to quantify the prevalence of substructure at various epochs and compared with samples of clusters observed with ROSAT. We also identify X-ray clusters in 3D and in projection in order to evaluate the importance of projection effects.

Program listing for Tuesday