Other
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341817j&link_type=abstract
American Astronomical Society, AAS Meeting #213, #418.17; Bulletin of the American Astronomical Society, Vol. 41, p.233
Other
Scientific paper
X-ray observations have shown that luminous early-type galaxies have extended hot coronae and dark matter halos. We have examined a sample of nearly 200 early-type galaxies observed with Chandra. In one-third of the massive galaxies, where the X-ray emission is dominated by that from hot gas, we observe X-ray cavities likely produced by AGN outbursts. Eighty percent of all galaxies in our sample have compact X-ray emission from their nuclear region. With Chandra's high spatial resolution, we can resolve individual, bright X-ray binaries, and the integrated emission from all LMXBs has been estimated. Although X-ray emission from stars cannot be resolved, the integrated emission from low mass galaxies has been used to estimate the stellar contribution in other galaxies. For individual galaxies, Chandra images show spectacular examples of ram-pressure stripping of gas from the galaxy as it moves through the surrounding cluster gas (e.g. M86 and M89) and the interaction of jets with the surrounding hot ISM (e.g. Cen A). This research was supported by the Smithsonian, the Chandra X-ray Center and MPA.
Churazov Eugene
Forman William
Jones Christine
Kraft Ralph
Machacek Marie M.
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