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

A. Vikhlinin·L. VanSpeybroeck·M. Markevitch·W. R. Forman·L. Grego
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Abstract

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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A. Vikhlinin, L. VanSpeybroeck, M. Markevitch, W. R. Forman, L. Grego. 2002-07-21. Evolution of the cluster X-ray scaling relations since z>0.4. https://doi.org/10.1086/344591

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