Parameters and predictions for the X-ray emitting gas of Coma, Perseus, and Virgo

Details Parameters and predictions for the X-ray emitting gas of Coma, Perseus, and Virgo Parameters and predictions for the X-ray emitting gas of Coma, Perseus, and Virgo

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213l..99b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 213, May 1, 1977, p. L99-L103.

Astronomy and Astrophysics

Astrophysics

122

Astronomical Models, Galactic Clusters, Interstellar Gas, Virgo Galactic Cluster, X Ray Sources, Abundance, Luminous Intensity, Microwave Emission, Size Determination, Star Clusters, X Ray Spectra

Scientific paper

The range of acceptable models for the intracluster gas in the Coma, Perseus, and Virgo clusters is determined from previous observations of the spectrum, intensity, and size of the cluster X-ray sources. Standard hydrostatic, wind, and inflow models are considered. For Virgo, a 'well' model is proposed in which the gas is trapped in the gravitational potential of M87, assumed to be very massive and extended. The iron abundance in the intracluster gas is determined from the observed strength of the 7-keV line feature; the required abundances for all models and all clusters are approximately equal and solar in value. The similarity of the abundances derived for these three clusters suggests that the line emission probably arises from the intracluster gas. Predictions are given for the cosmic microwave diminution and the dependence of X-ray size on observed energy for acceptable models for the intracluster gas.

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