Emss X-ray Bright "galaxies" Observed By Xmm Newton

Details Emss X-ray Bright "galaxies" Observed By Xmm Newton Emss X-ray Bright "galaxies" Observed By Xmm Newton

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.1340f&link_type=abstract

American Astronomical Society, HEAD meeting #9, #13.40; Bulletin of the American Astronomical Society, Vol. 38, p.372

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Scientific paper

We present new XMM-Newton observations of three high X-ray luminosity "normal" galaxies: MS1204.1+2826 (NGC4104), MS1143.6+2040 (NGC3884) and MS1309.1+3208. These objects are part of a flux limited (fx[0.3-3.5 kev] > 5x10^(-13) erg cm-2) sample of 8 high X-ray luminosity galaxies from the Einstein Medium Sensitivity Survey.
The observations were done with the aim at confirming that high X-ray luminosity normal galaxies discovered in deep XMM-Newton and Chandra survey and classified as new classes of exotic objects were already present in earlier and much brighter samples, and that this "unusual" populations appearing at low X-ray fluxes are actually the low-flux counterparts of the nearby and X-ray bright "galaxies" that have been known for two decades. The XMM-Newton observations were recently completed and show that one of the objects (MS1204.1+2826) is associated with a large extended emission centered on the galaxy but reaching well outside the optical object. The other two are instead clearly pointlike and hide an active core. In addition to these three objects, three others in the sample have already been observed by XMM-Newton and Chandra (and all three have a large potential well associated with the central galaxy). We will present the details of our new observations and analysis and compare the properties of these objects with the rest of the sample and with the high X-ray luminosity normal galaxies in the deep surveys.

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