Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..263f&link_type=abstract
Astronomicheskii Zhurnal, vol. 56, Mar.-Apr. 1979, p. 263-267. In Russian.
Astronomy and Astrophysics
Astronomy
Galactic Radiation, Interstellar Extinction, Milky Way Galaxy, Zodiacal Light, Anisotropy, Brightness, Diameters, Electromagnetic Absorption, Electrophotometry, Radial Velocity, Ubv Spectra
Scientific paper
A sample of faint Sc I-II galaxies is used to determine the coefficient AB in the cosecant law for visual extinction in the Galaxy. The radial velocities of the galaxies are not constrained, and data on their B magnitudes, B-V color indices, and linear diameters are analyzed separately. The strong effect of zodiacal light on the apparent angular diameters of the galaxies is taken into account, and observational selection effects are eliminated by employing distance or luminosity-class data. Three different values of AB are obtained separately from the B magnitudes, B-V indices, and linear diameters; a weighted mean of 0.315 + or - 0.064 mag is reported. Three situations are distinguished which yield different effective values for A sub B.
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