Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26as...42....9a&link_type=abstract
Astronomy and Astrophysics Supplement Series, vol. 42, Oct. 1980, p. 9-11.
Astronomy and Astrophysics
Astrophysics
14
A Stars, B Stars, Galactic Structure, Interstellar Extinction, Stellar Spectrophotometry, Atmospheric Effects, Electrophotometry, F Stars, Late Stars, Ubv Spectra
Scientific paper
B, A and F type stars are observed in an area of about 400 square degrees around the galactic south pole (SGP) using the Stroemgren-Crawford uvby-beta system at the 60 cm telescope of the Bochum station on La Silla, Chile. With calibrations for B and F type stars and the provisional calibration for the stars of Stroemgren's Late Group-A-stars, intrinsic (b-y)0 colors are derived and then used to describe the interstellar absorption structure of the SGP. To determine the galactic extinction perpendicular to the galactic plane, the reddening values of distant stars are averaged in order to include both the reddened and unreddened areas at the SGP. A mean value E(b-y)SGP equals 0.019 m is derived and is found to agree well with earlier values, except with that of Knude (1977). Explanations for the deviation are considered, implying that Knude's value is systematically too high.
Albrecht Roland
Maitzen Hans Michael
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