Mathematics – Logic
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apjs...50....1w&link_type=abstract
Astrophysical Journal Supplement Series, vol. 50, Sept. 1982, p. 1-22. Research supported by the Japan Society for the Promotio
Mathematics
Logic
29
Astronomical Photometry, Brightness Distribution, Digital Data, Galactic Structure, Luminosity, Virgo Galactic Cluster, Astronomical Catalogs, Astronomical Photography, Classifications, Data Reduction, Fourier Analysis, Isophotes, Radial Distribution
Scientific paper
A new method of reducing and analyzing surface photometry of galaxies is developed and used to secure a large body of homogeneous digital data. Twenty galaxies in the Virgo cluster are analyzed in this new system, and their isophotes and luminosity profiles are presented. Two new kinds of luminosity profiles, called the 'projected profile' and 'generalized radial profile', are introduced to allow comparative studies of global structures among all galaxies, regardless of inclination. Structure parameters are derived from Fourier and moment analyses of luminosity profiles of the 20 galaxies measured; these turn out to show tight correlations with morphological type.
Kodaira Keichi
Okamura Sadanori
Watanabe Makoto
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