An X-ray Atlas of Groups of Galaxies

Details An X-ray Atlas of Groups of Galaxies An X-ray Atlas of Groups of Galaxies

2003-02-19

arxiv.org/abs/astro-ph/0302393v1

Astronomy and Astrophysics

Astrophysics

39 pages, 12 figures, to appear in The Astrophysical Journal Supp

Scientific paper

10.1086/345736

A search was conducted for a hot intragroup medium in 109 low-redshift galaxy groups observed with the ROSAT PSPC. Evidence for diffuse, extended X-ray emission is found in at least 61 groups. Approximately one-third of these detections have not been previously reported in the literature. Most of the groups are detected out to less than half of the virial radius with ROSAT. Although some spiral-rich groups do contain an intragroup medium, diffuse emission is restricted to groups that contain at least one early-type galaxy.

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