Reproducing the entropy structure of clusters and groups
Abstract
We describe a semi-analytic model for the X-ray emitting gas in clusters and groups in which the gas is preheated before halo formation. The model relies on physically sound prescriptions for the formation and evolution of halo structure. For a gas temperature gradient corresponding to a polytropic index of 1.2 and an energy injection of 0.6 keV per gas particle, this model successfully reproduces the observed correlations between gas luminosity, gas temperature and halo mass. We use the model to investigate the detailed entropy structure of groups and clusters of galaxies and compare the results with the observational data.
- Publication:
-
IAU Colloq. 195: Outskirts of Galaxy Clusters: Intense Life in the Suburbs
- Pub Date:
- July 2004
- DOI:
- 10.1017/S1743921304000651
- Bibcode:
- 2004ogci.conf..302G