The Luminosity of the Classical Cepheid T VUL
Abstract
The classical Cepheid T Vul has been discovered to have a hot companion on International Ultraviolet Explorer satellite spectra. The companion has a spectral type of A0.8 V. The absolute magnitude of the Cepheid determined from the companion is Mv = -3.43 mag. Because the companion is significantly fainter and less massive than the Cepheid and the system has a very low reddening, this is a particularly well-determined luminosity. A high-accuracy velocity study would be valuable to look for orbital motion.
- Publication:
-
The Astronomical Journal
- Pub Date:
- July 1992
- DOI:
- 10.1086/116232
- Bibcode:
- 1992AJ....104..216E
- Keywords:
-
- Cepheid Variables;
- Companion Stars;
- Iue;
- Stellar Luminosity;
- Stellar Magnitude;
- Hot Stars;
- Ultraviolet Spectra;
- Astrophysics;
- CEPHEIDS