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Reproducing the entropy structure of clusters and groups

Published online by Cambridge University Press:  06 October 2004

G. González-Casado ,
J. M. Solanes ,
A. Manrique  and
E. Salvador-Solé
G. González-Casado
Affiliation:
Dep. Matemática Aplicada II, Univ. Politècnica de Cataluña, Pau Gargallo 5, Edificio U, E-08028 Barcelona, Spain
J. M. Solanes
Affiliation:
Dep. Astronomia i Meteorologia, Universidad de Barcelona, Martí Franquès 1, E-08028 Barcelona, Spain
A. Manrique
Affiliation:
Dep. Astronomia i Meteorologia, Universidad de Barcelona, Martí Franquès 1, E-08028 Barcelona, Spain
E. Salvador-Solé
Affiliation:
Dep. Astronomia i Meteorologia, Universidad de Barcelona, Martí Franquès 1, E-08028 Barcelona, Spain
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Abstract

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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.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 302 - 304
Copyright
© 2004 International Astronomical Union