Mathematics – Logic
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1520f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 96, Nov. 1988, p. 1520-1533. NASA-supported research.
Mathematics
Logic
117
Luminosity, Population Theory, Virgo Galactic Cluster, Astronomical Photometry, Brightness Distribution, Dwarf Galaxies, Elliptical Galaxies, Galactic Structure, Hubble Constant
Scientific paper
The authors compare the luminosity functions of galaxies of various Hubble types in the central 2.4° radius core of the Fornax Cluster and the 6° radius core of the Virgo Cluster. The properties (galaxy density, velocity dispersion, X-ray luminosity) of the two clusters are quite different, yet the authors find few significant differences in the luminosity functions, or in the morphological mix of galaxies between the two clusters. In particular, while there is some indication that the ratios of giants to dwarfs and early- to-late-type galaxies in the two clusters differ, they cannot exclude the possibility that they are identical. The authors discuss the selection limits of their survey and the completeness corrections that must be applied to the faint end of the luminosity function.
Ferguson Henry C.
Sandage Allan
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