Physics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe.184p&link_type=abstract
Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo
Physics
Galaxies
Scientific paper
We are studying the X-ray emission of galaxies (without AGN) locally through wide-area surveys (mostly from serendipitous data) and pointed observations of well-defined samples, and at z>0 in the Chandra Deep Fields. Our emphasis is currently on the integrated emission of the galaxies. Current results show that relation between X-ray emission and star-formation rate is probably not a simple linear correlation. The X-ray emission from late-type galaxies evolves significantly more strongly than that of early-type galaxies, which is expected given that the X-ray emission of late-type galaxies is usually dominated by recent star formation. Examples will be shown of where these results help to constrain the assessment of whether of the soft X-ray spectrum from AGN or potential AGN is dominated by starburst or AGN emission. The prospects of future very wide X-ray surveys from both current and future X-ray satellites will also be discussed.
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