The luminosity of the classical Cepheid T VUL

Details The luminosity of the classical Cepheid T VUL The luminosity of the classical Cepheid T VUL

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..216e&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 1, July 1992, p. 216-219. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

6

Cepheid Variables, Companion Stars, Iue, Stellar Luminosity, Stellar Magnitude, Hot Stars, Ultraviolet Spectra

Scientific paper

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.

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