Luminosity classification of galaxies in the revised Shapley-Ames Catalog

Details Luminosity classification of galaxies in the revised Shapley-Ames Catalog Luminosity classification of galaxies in the revised Shapley-Ames Catalog

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..745v&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Oct.-Nov. 1982, p. 745-747.

Astronomy and Astrophysics

Astronomy

9

Astronomical Catalogs, Luminosity, Spiral Galaxies, Magnitude, Sky Surveys (Astronomy)

Scientific paper

Generally good agreement is found between the DDO system and the luminosity classifications given by Sandage and Tammann (1979). After removing a systematic shift of 0.25 luminosity class the standard deviation of the difference between luminosity classification of the same galaxy is 0.68 luminosity class. The average standard deviation of absolute magnitudes derived from luminosity classifications are 0.86 m for vdB and 0.86 m for ST. This indicates that the scale advantage for classifications based on large reflector plates is approximately compensated for by the greater homogeneity of the Palomar Sky Survey material.

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