Absolute dimensions of eclipsing binaries. II - The early-type semidetached system V Puppis

Details Absolute dimensions of eclipsing binaries. II - The early-type semidetached system V Puppis Absolute dimensions of eclipsing binaries. II - The early-type semidetached system V Puppis

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...128...17a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 128, no. 1, Nov. 1983, p. 17-28. Research supported by the Danish Board for As

Astronomy and Astrophysics

Astrophysics

34

Astrometry, Dimensions, Early Stars, Eclipsing Binary Stars, Stellar Spectrophotometry, Light Curve, Mass Transfer, Orbital Elements, Radial Velocity, Stellar Evolution, Ubv Spectra

Scientific paper

A complete spectroscopic and photometric reanalysis is undertaken for V Pup in order to improve observational data to the point where a detailed theoretical calculation of its evolution will yield significant new results. The new spectroscopic orbital elements yield smaller masses than the previous data, and although the system is close to contact, the semidetached nature of V Pup can be unambiguously established. Critical reexamination fails to confirm any of the previous observational evidence for circumstellar matter, and alternative explanations of the observed anomalies are proposed. It is suggested that V Pup began its evolution as a near-contact system whose mass ratio is close to unity, so that Case A mass exchange set in before the original primary star had evolved, and that the rapid mass transfer was stopped before the mass ratio reversal had gone to extreme values.

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