Evolution of the cluster X-ray luminosity function slope

Details Evolution of the cluster X-ray luminosity function slope Evolution of the cluster X-ray luminosity function slope

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262....1h&link_type=abstract

Astrophysical Journal, Part 1, vol. 262, Nov. 1, 1982, p. 1-8.

Astronomy and Astrophysics

Astronomy

56

Galactic Clusters, Galactic Evolution, Luminosity, Red Shift, X Ray Astronomy, Astronomical Models, Distribution Functions, Flux Density, Signal To Noise Ratios, X Ray Sources

Scientific paper

The results of an X-ray survey of 58 clusters of galaxies at moderate and high redshifts are reported. Using a luminosity-limited subsample of 25 objects, it is found that to a redshift of 0.5 the slope of the luminosity function of distant clusters is independent of redshift and consistent with that of nearby clusters. The time scale for change in the slope must be greater than 9 billion years. The implications of the data for theoretical models are discussed. In particular, Perrenod's models (1980) with high Omega are excluded by the present data.

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