X-ray Selected Galaxy Groups at Intermediate Redshift

Details X-ray Selected Galaxy Groups at Intermediate Redshift X-ray Selected Galaxy Groups at Intermediate Redshift

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20711204m&link_type=abstract

American Astronomical Society Meeting 207, #112.04; Bulletin of the American Astronomical Society, Vol. 37, p.1344

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results from a multiwavelength study of a sample of galaxy groups selected from the ROSAT Deep Cluster Survey. The groups span the redshift range z ˜ 0.23--0.59 and have between 4 and 20 confirmed members. The velocity dispersions of these groups range from ˜ 125 km/s to 650 km/s. Similar to X-ray groups at low redshift, these systems contain a significant population of early-type galaxies. In most cases, the X-ray emission is peaked on the most luminous elliptical galaxy in the group. However, there are a few prominent exceptions where the X-ray emission is not centered on any particular galaxy. These systems may be groups in the process of collapsing for the first time.

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