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X-ray properties of present-day galaxy systems from an inside-outgrowth modelin a preheating scenario

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort ,
J. Solanes ,
A. Manrique ,
G. González-Casado  and
E. Salvador-Solé
J. Solanes
Affiliation:
Departament d'Astronomia i Meteorologia i CER d'Astrofísica, Partícules i Cosmologia, Universitat de Barcelona, Spain
A. Manrique
Affiliation:
Departament d'Astronomia i Meteorologia i CER d'Astrofísica, Partícules i Cosmologia, Universitat de Barcelona, Spain
G. González-Casado
Affiliation:
Departament de Matemàtica Aplicada II, Universitat Politècnica de Catalunya, Spain
E. Salvador-Solé
Affiliation:
Departament d'Astronomia i Meteorologia i CER d'Astrofísica, Partícules i Cosmologia, Universitat de Barcelona, Spain
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Abstract

We have developed an analytic model for a preheated, polytropic IGM inhydrostatic equilibrium within a NFW potential in which the evolutionof the halo structure between major merger events proceeds inside-outby accretion. For a polytropic index of 1.2, consistent with both manyobservational results and predictions from high-resolution gasdynamicalsimulations, our model is capable of reproducing faithfully all theobserved X-ray properties of nearby relaxed, non-cooling flow groupsand clusters of galaxies with a universal level of energy injection ofabout half a keV (see Solanes et al. 2005 for details).

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 297 - 298
Copyright
© EAS, EDP Sciences, 2006

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