Evolved contact systems of spectral type A - AU Puppis, V535 Arae, and V1073 Cygni

Details Evolved contact systems of spectral type A - AU Puppis, V535 Arae, and V1073 Cygni Evolved contact systems of spectral type A - AU Puppis, V535 Arae, and V1073 Cygni

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..917l&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, June 15, 1978, p. 917-923. Research supported by the University of Nebraska.

Astronomy and Astrophysics

Astrophysics

60

A Stars, Eclipsing Binary Stars, Electrophotometry, Light Curve, Stellar Evolution, Main Sequence Stars, Stellar Mass, Stellar Spectrophotometry

Scientific paper

The photoelectric observations of AU Pup, V535 Ara, and V1073 Cyg were reanalyzed with Wilson and Devinney's approach. All three systems are found to be contact configurations. AU Pup has an unusually large degree of overcontact, 72%. V1073 Cyg is found to be an evolved contact system since the radius of the primary is twice that of a zero-age main-sequence star of corresponding mass. All three systems are found to be evolved according to their locations in the period-spectral-type diagram. Improved photometric parameters are reported for all three systems.

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