Frequency of various galaxy morphological types in the MCG catalog

Details Frequency of various galaxy morphological types in the MCG catalog Frequency of various galaxy morphological types in the MCG catalog

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..247d&link_type=abstract

Astronomicheskii Zhurnal, vol. 56, Mar.-Apr. 1979, p. 247-251. In Russian.

Mathematics

Logic

2

Astronomical Catalogs, Frequency Distribution, Morphological Indexes, Spiral Galaxies, Compact Galaxies, Elliptical Galaxies, Galactic Structure, Tables (Data)

Scientific paper

The frequencies of galaxies of different morphological types among the 28,296 galaxies listed in Vols. I-IV of the Morphological Catalog of Galaxies (MCG) compiled by Vorontsov-Vel'iaminov et al. (1962, 1964-68) are computed. The galaxy forms described in the catalog are divided into 10 types, and five groups are established for the degrees of patchiness. It is found that spirals account for 73.5% of all the galaxies, E+S0 galaxies constitute 24.3%, and irregulars amount to 1.5%. Interacting systems of galaxies of all morphological types comprise 6.2% of all the cataloged galaxies, while compact galaxies amount to 13.5%. The results indicate that late-type spirals (Sc) are more frequent among nearby objects and that early-type (Sa) spirals are more frequent among remote galaxies.

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