Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.6203m&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #62.03; Bulletin of the American Astronomical Society, Vol. 27, p.1372
Astronomy and Astrophysics
Astronomy
Scientific paper
In the last 5 years our knowledge of the x-ray emission from clusters has exploded with high quality Rosat image and ASCA spectra. We are now able to obtain detailed measurements of the mass and mass distribution of clusters out to radii of \ 2 Mpc for relaxed systems.over a a mass range from 10(13-4^15) solar masses. In addtion the abundances of O, Si, S, and Fe can be reliably obtained over the same mass range. For massive clusters the elemental ratios strongly indicate that type II supernova were responsible for most of the metals. However less massive systems may have a substantial contribution from type Is, The total mass of alpha burning elements strongly indicates that most galaxies went through a extremely luminous early phase which resulted in the ejetion of \ 1/2 of their total mass. The Fe abundance as a function of redshift shows little if any change out to redshifts of \ 0.5 confirming the early enrichment of the intergalactic medium in clusters. Detailed temperature maps for merging systems have shown direct evidence for interaction and allow modeling of these complex systems.
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