The luminosity function for galaxies and the clustering of galaxies

Details The luminosity function for galaxies and the clustering of galaxies The luminosity function for galaxies and the clustering of galaxies

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975phdt.........3s&link_type=abstract

Ph.D. Thesis California Inst. of Tech., Pasadena.

Astronomy and Astrophysics

Astronomy

4

Galaxies, Luminosity, Astronomical Models, Galactic Evolution, Perturbation Theory, Statistical Distributions

Scientific paper

An analytic representation for the luminosity function for galaxies is proposed. Best fits of this function to counts of nearby bright galaxies and to counts of galaxies in rich clusters were obtained. The proposed representation contains a characteristic magnitude which exhibits an equivalent dispersion of only .24 magnitudes from cluster to cluster. The narrow dispersion in absolute magnitude observed for the brightest members of clusters is understood in large part as statistical fluctuation about a universal luminosity function, but the correlation of absolute magnitude with richness expected from the proposed representation is not observed. It is shown that galaxies will condense into clusters of the sizes presently observed if the perturbations giving rise to galaxies were randomly distributed at recombination.

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