Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004fxra.book..149m&link_type=abstract
In: Frontiers of X-ray astronomy. Edited by A. C. Fabian, K. A. Pounds, R. D. Blandford. Cambridge (UK): Cambridge University Pr
Astronomy and Astrophysics
Astronomy
2
Galaxy Clusters, Cosmology
Scientific paper
The new XMM-Newton and Chandra data, combined with an analysis of the very large ASCA dataset, have led to fundamental new results on the chemical abundances in clusters, groups and elliptical galaxies. The statistical errors are small and the number of well-determined elements has increased substantially. We compare the cluster abundances with theoretical models, the stars in the M and the high-redshift Universe. The observed abundances do not resemble any of these, leading to rather unusual new requirements on supernova yields and rates. The new level of precision allowed by high-resolution data, as it is extended to clusters by Astro-E, will strongly test these conclusions. However, it is already clear that the RGS data for elliptical galaxies are a major challenge for theoretical modelling.
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