The XMM/IMACS Groups Project

Details The XMM/IMACS Groups Project The XMM/IMACS Groups Project

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.1337m&link_type=abstract

American Astronomical Society, HEAD meeting #9, #13.37; Bulletin of the American Astronomical Society, Vol. 38, p.372

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results from the XMM/IMACS Groups Project, a study targeting a redshift-selected, statistically complete sample of groups of galaxies. Combining X-ray observations of the hot intragroup medium with optical imaging and spectroscopy of the galaxy population, the project aims to explore the X-ray properties of typical groups for the first time. Here, we present results for the eight groups observed by XMM so far. We detect an intragroup medium component in several of the groups. In a few cases, the luminosity of the diffuse gas component is among the lowest found for any X-ray detected group to date. Unlike most previously studied X-ray groups, these X-ray faint groups lack a dominant central elliptical galaxy. These results suggest that previous group samples studied in X-rays provided a biased picture of the group population.

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