Intrinsic UV colors of OB stars.
Abstract
The intrinsic energy distributions in spectra of young, hot OB stars, based on the photometric UV measurements in the ANS satellite bands, are presented. The colour indices, free of interstellar reddening, are derived from the two-colour diagrams with the application of the special check of the correctness of intrinsic B - V indices (the ironing-out of the 2200 Å extinction band in the mean unreddened spectra of given spectral types and luminosity classes). The obtained flux distributions are compared to those based on the TD - 1 UV spectra. The agreement is very satisfactory. The present results, based on much bigger samples of every Sp/L than any other, previously determined UV colours, may be very useful both when determining stellar atmospheric parameters and extinction laws. Intrinsic continuous spectra of Be stars are proved to be identical with those of normal B stars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1993
- Bibcode:
- 1993A&A...273..575P
- Keywords:
-
- stars: colors of;
- stars: early-type