The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe

Details The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe

1994-09-29

arxiv.org/abs/astro-ph/9409091v1

Astronomy and Astrophysics

Astrophysics

11 pages, 3 figures uuencoded postscript file, (92 kb), accepted for publication in Astrophysical Journal Letters. Also availa

Scientific paper

10.1086/187669

We present the first self-consistently computed results on the evolution of X-ray properties of galaxy clusters in a Cold + Hot Dark Matter (CHDM) model. We have performed a hydrodynamic plus N-body simulation for the COBE-compatible CHDM model with standard mass components: Omega(hot) = 0.3, Omega(cold) = 0.6 and Omega(baryon) = 0.1 (h = 0.5). In contrast with the CDM model, which fails to reproduce the observed temperature distribution function dN/dT (Bryan et al. 1994b), the CHDM model fits the observational dN/dT quite well. Our results on X-ray luminosity are less firm but even more intriguing. We find that the resulting X-ray luminosity functions at redshifts z = 0.0, 0.2, 0.4, 0.7 are well fit by observations, where they overlap. The fact that both temperatures and luminosities provide a reasonable fit to the available observational data indicates that, unless we are missing some essential physics, there is neither room nor need for a large fraction of gas in rich clusters: 10% (or less) in baryons is sufficient to explain their X-ray properties. We also see a tight correlation between X-ray luminosity and gas temperature.

Affiliated with

Also associated with

No associations

Rating

The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution of X-Ray Clusters in a Cold Plus Hot Dark Matter Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-174568