Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..945v&link_type=abstract
Astrophysical Journal, Part 1, vol. 235, Feb. 1, 1980, p. 945-954.
Astronomy and Astrophysics
Astrophysics
24
Binary Stars, Dwarf Stars, Stellar Spectra, Stellar Spectrophotometry, Stellar Structure, Ubv Spectra, Absorption Spectra, Balmer Series, Electrophotometers, Emission Spectra, Light Curve, Line Spectra, Stellar Mass
Scientific paper
Photoelastic UBV photometry and spectroscopy of the southern dwarf nova BV Centauri is analyzed to determine the orbital period and basic parameters of the system. The light curves obtained indicate a period of about 0.61 days, with a hump shape typical of cataclysmic variables. Spectroscopic data suggest that the system consists of a hot primary exhibiting Balmer series and He I 4471-A emission, and a G5-G8 IV-V secondary. Masses of 1.4 solar masses are obtained from radial velocity data for each of the components, along with orbital elements and the absolute dimensions of the system. The light curves and B-V color variations are interpreted in terms of the inhomogeneous atmosphere of the red star with a slightly enhanced effective temperature around the inner Lagrangian point. The U-B color curve is explained by the dominance of free-free transitions in the hot spot, with the disk characterized by a strong U-B excess due to the Balmer continuum in emission.
Breysacher Jacques
Vogt Nicolas
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