Hot gas in clusters of galaxies

Details Hot gas in clusters of galaxies Hot gas in clusters of galaxies

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975mnras.173..585g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 173, Dec. 1975, p. 585-603.

Astronomy and Astrophysics

Astronomy

101

Adiabatic Conditions, Galactic Clusters, Gravitational Fields, High Temperature Gases, Intergalactic Media, Potential Fields, Astronomical Models, Atmospheric Models, Spaceborne Astronomy, X Ray Sources, X Ray Spectra

Scientific paper

We present a series of models which describe adiabatic, hydrostatic atmospheres of hot gas in the gravitational potential wells of clusters of galaxies. The models can account for the observed X-ray spectra and surface brightness distributions of clusters. For a given X-ray luminosity, the adiabatic models can accommodate much more intergalactic gas than can isothermal models and we therefore re-open the possibility that the outer regions of clusters are bound by hot gas. We show how adiabatic atmospheres arise naturally from the infall of primordial matter into the cluster and we consider their temporal evolution as cooling begins.

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