Globular cluster color excesses and the cosecant law

Details Globular cluster color excesses and the cosecant law Globular cluster color excesses and the cosecant law

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62..697z&link_type=abstract

(Astronomicheskii Zhurnal, vol. 62, July-Aug. 1985, p. 697-703) Soviet Astronomy (ISSN 0038-5301), vol. 29, July-Aug. 1985, p. 4

Astronomy and Astrophysics

Astronomy

Globular Clusters, Stellar Color, Data Correlation, Metallicity, Stellar Spectra, Ubv Spectra

Scientific paper

The use of the cosecant law E(B-V) = a(B-V)/csc b/ to estimate globular cluster color excesses is demonstrated. The coefficient a(B-V), representing the color excess E(B-V) extrapolated to the pole, is evaluated by three different methods: from the relation between /csc b/ and the color excess of individual globular clusters, from the relation between cluster color and chemical composition, and by considering the position of globular clusters in the two-color (U-B, B-V) diagram. Application of the results shows that there is no evidence of huge Galactic polar caps free from extinction, and that the mean ratio of the H I column density to E(B-V) is 5.0 x 10 to the 21st atoms/sq cm/mag.

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