The spatial distribution of the interstellar extinction.
Abstract
Extinction values and distances have been computed from UBV, MK and beta data for more than 11,000 O to F stars, including 7,565 O and B stars. For 1,020 stars two independent distance moduli were derived using absolute magnitudes based on the MK spectral type as well as beta values. The mean value of their differences is less than 0.01 magnitude. With the aid of photographs of the Milky Way 325 fields in the galactic belt between latitudes of -7.6 and 7.6 deg were demarcated in which the extinction and the star density is rather homogeneous. Diagrams of interstellar extinction as a function of distance of these fields are discussed. From the fields with the most reliable of interstellar extinction as a function of distance relations the galactic distribution of the dust up to 3 kpc has been derived.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1980
- Bibcode:
- 1980A&AS...42..251N
- Keywords:
-
- Galactic Structure;
- Interstellar Extinction;
- Milky Way Galaxy;
- Spatial Distribution;
- Astronomical Photography;
- Cosmic Dust;
- Early Stars;
- F Stars;
- Ubv Spectra;
- Astronomy;
- Galactic Structure:OB Stars;
- Interstellar Extinction