The physical implications of an isothermal model for the hot intracluster medium

Details The physical implications of an isothermal model for the hot intracluster medium The physical implications of an isothermal model for the hot intracluster medium

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stin...8521089h&link_type=abstract

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Atmospheric Models, Brightness Distribution, Flux Density, Galactic Clusters, Isothermal Layers, X Ray Imagery, Approximation, Density Distribution, High Temperature Gases, Mass Distribution

Scientific paper

X-ray fluxes from HEAO-1 A2 and Einstein Imaging Proportional Counter (IPC) observations of clusters of galaxies were used to constrain the parameter beta in the isothermal surface brightness profile. Beta is found primarily to have values between .50 and .75 for 15 clusters. Eight of these objects have values of beta previously measured using imaging observations. For these clusters good agreement is found with the values reported here implying that this profile is a good description of the surface brightness out to 8 to 10 core radii. The total gas mass and radial distribution (assuming spherical symmetry) within the cluster resulting from the isothermal model imply an extended halo of hot gas which has 30 to 60% of the virial mass for some clusters.

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