XMM-Newton survey of IGM: news for the modified entropy scaling

Details XMM-Newton survey of IGM: news for the modified entropy scaling XMM-Newton survey of IGM: news for the modified entropy scaling

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004bdmh.confe..28f&link_type=abstract

"Proceedings of "Baryons in Dark Matter Halos". Novigrad, Croatia, 5-9 Oct 2004. Editors: R. Dettmar, U. Klein, P. Salucci. Publ

Physics

Scientific paper

Results of XMM-Newton survey of 40 galaxy groups are presented with accent on the global properties of the gas, such as entropy and pressure. We confirm the modified entropy scaling relation of Ponman, Sanderson & Finoguenov (2003) at central parts of the groups (0 1r 500). At the same time, we show distinct differences between the virialized groups and emission originated from halos of early-type galaxies. The slopes of the entropy profiles of the groups are on average flatter than 1.1 law, typical of the clusters. We present the results of numerical simulations using the P-GADGET-II code, which are the first simulations capable to reproduce these newly observed trends.

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