NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-03-25 T12:01:21 PDT
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For refcode 1960ApJ...131..215V:
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Copyright by American Astronomical Society. Reproduced by permission
1960ApJ...131..215V A Preliminary Luminosity Classification of late-Type Galaxies Sidney van den Bergh David Dunlap Observatory, Richmond Hill, Ontario Abstract A system of luminosity classification for late-type galaxies is described. The classification is based on the strong correlation between the absolute magnitude and the degree of development of spiral arms. By means of the present system the absolute magnitudes of late-type galaxies may be determined with an accuracy of about 0.5 mag.
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