Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102...14p&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 14-29. NASA-supported research.
Astronomy and Astrophysics
Astronomy
37
Galactic Clusters, Morphology, X Ray Spectra, Brightness Distribution, Heao 2, Luminosity, Radio Astronomy, Visible Spectrum
Scientific paper
The X-ray, optical, and radio properties of a sample of 25 poor clusters of galaxies were investigated on the basis of published observations. The X-ray emission from poor clusters was classified into morphological types depending on whether they contain a dominant galaxy or not, as was done by Jones and Forman (1984) for rich clusters. It was found that 13 of the clusters could be classified as D-type clusters, where the peak coincides with a dominant galaxy. For the five T-type clusters in this group, it was found that radio sources are detected almost three times as often as in D-type clusters, indicating that the production of radio sources in poor clusters may be dependent on the shape of the cluster potential well. The optical properties of seven clusters that were not detected at X-ray wavelengths are indistinguishable from those of the X-ray detected clusters, indicating that all poor clusters have a hot intracluster medium.
Burns O. Jr. J.
Duric Nebojsa
Newberry Michael V.
Price Rob
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