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Issue A&A
Volume 379, Number 1, November III 2001
Page(s) 107 - 114
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20011317



A&A 379, 107-114 (2001)
DOI: 10.1051/0004-6361:20011317

$\vec{XMM}$- $\vec{Newton}$ observations of the cluster of galaxies Abell 496

Measurements of the elemental abundances in the intracluster medium
T. Tamura1, J. A. M. Bleeker1, J. S. Kaastra1, C. Ferrigno1 and S. Molendi2

1  SRON National Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
2  IFC Milan, 20133 Milano, Italy

(Received 16 May 2001 / Accepted 13 September 2001 )

Abstract
The results from XMM-Newton observations of the relaxed cluster of galaxies Abell 496 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras show a temperature drop and a Fe abundance increase in the intra-cluster medium (ICM) towards the cD galaxy at the cluster center. The abundances of Si and S also show a central enhancement. High resolution soft X-ray spectra obtained with the Reflection Grating Spectrometers provides a strong constraint on the temperature structure in the central cool plasma. Furthermore, the O abundance at the cluster core is accurately measured based on the OVIII ${\rm Ly\alpha}$ line detected with the RGS. Contrary to the Si, S, and Fe abundances, the O abundance is radially constant over the cluster.


Key words: galaxies: clusters: individual: Abell 496 -- galaxies: clusters: general -- galaxies: abundances -- X-rays: galaxies: clusters

Offprint request: T. Tamura, T.Tamura@sron.nl

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© ESO 2001


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