The evolution of cluster X-ray sources. IV - The luminosity function

Details The evolution of cluster X-ray sources. IV - The luminosity function The evolution of cluster X-ray sources. IV - The luminosity function

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..373p&link_type=abstract

Astrophysical Journal, Part 1, vol. 236, Mar. 1, 1980, p. 373-387.

Mathematics

Logic

39

Galactic Clusters, Galactic Evolution, Galactic Structure, Luminosity, X Ray Sources, Cosmology, Density (Mass/Volume), Interstellar Gas, Linear Equations, Mass Distribution, Red Shift, Stellar Mass Ejection

Scientific paper

The paper considers the evolution of the X-ray luminosity function of clusters of galaxies. The assumption that galaxies form first, then cluster together as a result of gravitation is analyzed, and the richness distribution of Abell clusters supports this assumption as compared with the protocluster hypothesis. The luminosity function is produced by combining a generalized Press-Schechter evolutionary mass function for clusters with a power law X-ray luminosity-mass relation. Many models of the gas supply rate to the intercluster medium show that the evolution of the luminosity function does not vary greatly; thus it appears that the Omega dependence will dominate and that number counts of X-ray clusters will yield cosmological information.

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