Analysis of HDE 269696 = LB 3459, and O-type subdwarf eclipsing binary system

Details Analysis of HDE 269696 = LB 3459, and O-type subdwarf eclipsing binary system Analysis of HDE 269696 = LB 3459, and O-type subdwarf eclipsing binary system

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..165c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 195, Apr. 1981, p. 165-172.

Astronomy and Astrophysics

Astronomy

8

Eclipsing Binary Stars, O Stars, Stellar Envelopes, Stellar Spectrophotometry, Subdwarf Stars, Radial Velocity, Stellar Evolution, Stellar Spectra

Scientific paper

Spectroscopic data of this blue subdwarf indicate that the primary eclipse is a transit rather than an occultation. It is also found that the light contributed by the secondary is primarily due to a reflection effect and its intrinsic luminosity is very low compared to the primary. The primary most likely consists of a 0.2 solar-mass degenerate helium core surrounded by a low mass envelope; its companion (0.04 solar mass) is probably also degenerate, although it may be a faint main-sequence star. Possible evolutionary scenarios are discussed, with the conclusion that LB3459 is an interesting example of common envelope evolution.

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