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http://hdl.handle.net/2248/1491
Title: | X-ray structure of clusters of galaxies with ROSAT |
Authors: | Singh, K. P |
Keywords: | X-ray Clusters of galaxies |
Issue Date: | 1993 |
Publisher: | Astronomical Society of India |
Citation: | BASI, Vol. 21, pp. 293-301 |
Abstract: | X-ray emission from clusters of galaxies is due to thermal Bremsstrahlung from a hot thin gas in the intergalactic medium. The gas is generally considered to be smoothly distributed with a size of approximately 3 Mpc. X-ray imaging with the Einstein Observatory has shown that the surface brightness departs from a symmetrical distribution or has multiple peaks (sub-structure) in nearly 30% of the clusters. Recent ROSAT observations show (1) the relaxed clusters like Coma and Abell 2256 have significant sub-clustering due to on-going mergers, (2) the existence of filamentary X-ray structure in the central regions of the cooling flow clusters, and (3) the dominance of dark matter and the lowest metal abundance in the gas in a small group of galaxies, NGC 2300. These results from ROSAT are reviewed here |
URI: | http://hdl.handle.net/2248/1491 |
Appears in Collections: | BASI Publications |
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paper_8.pdf | 1.1 MB | Adobe PDF | ![]() View/Open |
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