Evolution of the cluster X-ray scaling relations since z>0.4

Details Evolution of the cluster X-ray scaling relations since z>0.4 Evolution of the cluster X-ray scaling relations since z>0.4

2002-07-21

arxiv.org/abs/astro-ph/0207445v1

Astrophys.J. 578 (2002) L107

Astronomy and Astrophysics

Astrophysics

submitted to ApJ Letters

Scientific paper

10.1086/344591

We derive correlations between X-ray temperature, luminosity, and gas mass for a sample of 22 distant, z>0.4, galaxy clusters observed with Chandra. We detect evolution in all three correlations between z>0.4 and the present epoch. In particular, in the Omega=0.3, Lambda=0.7 cosmology, the luminosity corresponding to a fixed temperature scales approximately as (1+z)**(1.5+-0.3); the gas mass for a fixed luminosity scales as (1+z)**(-1.8+-0.4); and the gas mass for a fixed temperature scales as (1+z)**(-0.5+-0.4) (all uncertainties are 90% confidence). We briefly discuss the implication of these results for cluster evolution models.

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