Computer Science
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...90s&link_type=abstract
XMM-Newton Proposal ID #02016702
Computer Science
Ngc 4382, Ngc 5363, Xmm-Newton Proposal 02016702
Scientific paper
XMM observations of young elliptical galaxies will determine if they have hot gas in their ISM. Many old, relaxed ellipticals posess such hot gaseous haloes, however the mechanism by which these are created is not understood. Suggestions are that the hot haloes formed from stellar mass loss or by thermalization of cold gas in-falling from tidal tails after a merger. Correlations of X-rays with age indicate a surprisingly slow build-up of hot gas, over several Gyr. So where does the hot gas come from? We will obtain sensitive XMM-Newton observations of young ellipticals (1 - 3 Gyr) and compare these with data for older ellipticals, to see how the X-ray emission evolves. If there is no hot gas in the young ellipticals, then we will get a clean view of the discrete stellar components.
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