The velocity dispersion-temperature correlation from a limited cluster sample

Details The velocity dispersion-temperature correlation from a limited cluster sample The velocity dispersion-temperature correlation from a limited cluster sample

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aipc..336..251b&link_type=abstract

Dark matter. AIP Conference Proceedings, Volume 336, pp. 251-254 (1995).

Mathematics

Logic

Galaxy Clusters

Scientific paper

Most studies of correlations between X-ray and optical properties of galaxy clusters have used the largest samples of data available, regardless of the morphological types of clusters included. Given the increasing evidence that morphology is related to a cluster's degree of dynamical evolution, we approach the study of X-ray and optical correlations differently. We evaluate the relationship between velocity dispersion and temperature for a limited set of galaxy clusters taken from Bird (1994), which all possess dominant central galaxies and which have been explicitly corrected for the presence of substructure. We find that σr~T0.69+/-0.13, significantly steeper than the σr~T0.5 relationship predicted by the virial theorem. The protogalactic winds model of White (1991) reproduces the observed relationship between σr and T.

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