Astronomy and Astrophysics – Astronomy
Scientific paper
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.
Gull Stephen F.
Northover J. E. K.
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