XMM-Newton Observations of Evolution of Cluster X-Ray Scaling Relations at z=0.4-0.7

Abstract

We present a spatially resolved analysis of the temperature and gas density profiles of galaxy clusters at z=0.4-0.7 observed with XMM-Newton. These data are used to derive the total cluster mass within the radius r₅₀₀ without assuming isothermality and also to measure the average temperature and total X-ray luminosity, excluding the cooling cores. We derive the high-redshift M-T and L-T relations and compare them with the local measurements. The high-redshift L-T relation has low scatter and evolves as L~(1+z)^1.8+/-0.3 for a fixed T, in agreement with several previous Chandra and XMM-Newton studies (Vikhlinin et al., Lumb et al., and Maughan et al.). The observed evolution of the M-T relation follows M₅₀₀~E(z)^-α, where we measure α=0.88+/-0.23. This is in agreement with predictions of the self-similar theory, α=1.