XMM-Newton Measurements of the Elemental Abundances in the Intracluster Medium

Details XMM-Newton Measurements of the Elemental Abundances in the Intracluster Medium XMM-Newton Measurements of the Elemental Abundances in the Intracluster Medium

2002-09-17

arxiv.org/abs/astro-ph/0209332v1

Astronomy and Astrophysics

Astrophysics

Contribution to "New Visions of the X-ray Universe in the XMM-Newton and Chandra Era" 26-30 November 2001, ESTEC, The Netherla

Scientific paper

Based on XMM-Newton observations of a sample of galaxy clusters, we have measured the elemental abundances (mainly O, Si, S, and Fe) and their spatial distributions in the intracluster medium (ICM). In the outer region of the ICM, observations of the O:Si:S:Fe ratio are consistent with the solar value, suggesting that the metals in the ICM were produced by a mix of supernovae (SNe) Ia and II. On the other hand, around the cD galaxy, the O/Fe ratios are about half of the solar value because of a central excess of the Fe abundance. An increase of the relative contribution from SNe Ia in the cD galaxy to the metal production towards the center is the most likely explanation.

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