Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....85..362r&link_type=abstract
Astronomy and Astrophysics, vol. 85, no. 3, May 1980, p. 362-364.
Astronomy and Astrophysics
Astrophysics
9
Eclipsing Binary Stars, Novae, Stellar Spectrophotometry, White Dwarf Stars, Astrophysics, Gravitational Waves, Light Curve, Main Sequence Stars, Radial Velocity, Stellar Mass
Scientific paper
Recent photometric and spectroscopic observations of OY Car obtained by Vogt (1979) are used to determine the main physical parameters of this binary. Under the assumption that the secondary is a main sequence star which fills its critical Roche-volume, the resulting parameters are found to be: mass of the white dwarf primary equals (0.30 + or - 0.05) solar masses, mass of the secondary equals (0.12 + or 0.02) solar masses, radius of the secondary equals (0.15 + or - 0.01) solar radii, orbital inclination equals 75.8 deg + or - 0.8 deg, radial velocity of the primary equals (110 + or - 10) km per s. It is noted that these parameters make OY Car very similar in structure to Z Cha, and the possibility that the mass exchange occurring in OY Car is induced by radiation of gravitational waves is discussed.
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