The Relation between Galaxies and Intracluster Gas in Clusters

Details The Relation between Galaxies and Intracluster Gas in Clusters The Relation between Galaxies and Intracluster Gas in Clusters

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.6108l&link_type=abstract

American Astronomical Society, 184th AAS Meeting, #61.08; Bulletin of the American Astronomical Society, Vol. 26, p.961

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We examine the relation between optical and X-ray properties of nearby clusters of galaxies. We compare the observed galaxy velocity dispersion in clusters to the X-ray temperature of the intracluster gas through the beta-parameter which relates the average energy per unit mass in the galaxies to that in the gas. The relation is consistent with that expected from an isothermal model where both the gas and the galaxies are in hydrostatic equilibrium with the binding cluster potential. In addition, we find that the galaxy and gas density distribution follow one another; that is, no significant ``beta-discrepancy'' exists.

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