Causes of the Scatter in The L-T Relation In Cool Clusters: The Cluster Cores
Abstract
The relationship between X-ray temperature and luminosity is well defined for a wide range of temperatures, with fairly minimal scatter over most of that range. The exception is at around a temperature of 2-4 keV, where clusters span more than an order of magnitude in luminosity. While this scatter is well known, the reasons for it are not. We present an analysis of observations from the Chandra and XMM-Newton archives of a flux-limited sample of clusters in this temperature range in an attempt to quantify the origins of the large range of cluster luminosities. We examine azimuthal asymmetries both in imaging and in spectra. We also discuss how differences in the central cluster potentials and gas density profiles may effect the global luminosity. Our preliminary analysis shows that the most luminous systems are the most centrally concentrated. We will also highlight differences between the profiles of heavy elements. Finally, differences in merger histories will also be discussed.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.2053K