Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100..175v&link_type=abstract
Astronomy and Astrophysics, vol. 100, no. 1, July 1981, p. 175-177.
Astronomy and Astrophysics
Astrophysics
3
Blue Stars, Companion Stars, Stellar Spectrophotometry, Supergiant Stars, Variable Stars, Hertzsprung-Russell Diagram, Iue, Stellar Temperature, Ubv Spectra
Scientific paper
V 810 Cen = HR 4511 = HD 101947 is a yellow variable supergiant on the blue side of the Cepheid Strip. Photometric characteristics and recent IUE satellite spectra indicated the presence of a blue supergiant companion. On account of spectroscopic, photometric and evolutionary considerations, the companion has a likely effective temperature of 25,000-30,000 K. With this temperature and the V-B/B-L diagram of the VBLUW system, an attempt is made to determine the range of M(v), T(eff), log g and unreddened photometric parameters of both stars. The spectral type of the cool supergiant could be F7.5.
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