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.
- Publication:
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The Astrophysical Journal
- Pub Date:
- November 2005
- DOI:
- 10.1086/433170
- arXiv:
- arXiv:astro-ph/0504233
- Bibcode:
- 2005ApJ...633..781K
- Keywords:
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- Galaxies: Clusters: General;
- Surveys;
- X-Rays: Galaxies;
- Astrophysics
- E-Print:
- ApJ in press, updated to match the accepted version