Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.187....1k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 187, Apr. 1979, p. 1-7.
Astronomy and Astrophysics
Astronomy
17
Eclipsing Binary Stars, O Stars, Spectrum Analysis, Stellar Spectrophotometry, Subdwarf Stars, Hot Stars, Orbital Elements, Stellar Magnitude, White Dwarf Stars
Scientific paper
Four-color photometry of the short-period eclipsing binary system LB3459 confirms features seen in earlier less-detailed data. An analysis of all the observational data suggests the system to be an O-type subdwarf plus a hot white dwarf, rather than two sdO stars. A value of 0.03 is obtained for the linear limb-darkening coefficient of the primary, and estimates of the absolute magnitudes of the two components give a distance of 70 + or - 25 pc for the system. The primary and secondary may have radii as small as 0.04 solar radius and 0.02 solar radius, respectively, indicating a component separation of only 0.25 solar radius. Several unsolved problems connected with the nature and evolution of the LB3459 system are noted.
Hilditch Ron W.
Kilkenny Dave
Penfold J. E.
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