Journal
ASTROPHYSICAL JOURNAL
Volume 578, Issue 2, Pages L107-L111Publisher
IOP PUBLISHING LTD
DOI: 10.1086/344591
Keywords
galaxies : clusters : general; surveys; X-rays : galaxies
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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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