XMM-Newton Proposal 02060901

Physics

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Hcg57, Xmm-Newton Proposal 02060901

Scientific paper

It has been revealed that groups of galaxies contain a large amount of hot gas as well as galaxy clusters. Therefore, observations of X-ray emission from groups of galaxies allow us to estimate mass distribution and elemental abundances. However, only elliptical-dominant groups have been investigated until now, due to X-ray faintness of spiral-dominant ones. Here we propose to observe a spiral-dominant group of galaxies HCG 57 in order to investigate differences of temperature, metal, mass, and entropy between spiral-dominant and elliptical-dominant.

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