FT LUPI - UBV photometry and synthetic solution

Details FT LUPI - UBV photometry and synthetic solution FT LUPI - UBV photometry and synthetic solution

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..883l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, June 15, 1986, p. 883-894.

Astronomy and Astrophysics

Astronomy

25

B Stars, Eclipsing Binary Stars, Light Curve, Main Sequence Stars, Stellar Spectrophotometry, Ubv Spectra, Mass Transfer, Roche Limit, Spectral Energy Distribution, Spectrum Analysis, Stellar Evolution, Stellar Luminosity

Scientific paper

The authors present 1423 UBV observations of the eclipsing binary FT Lupi observed over 6 yr at Bosque Alegre Station of Córdoba Observatory. A period study based on 32 photoelectric minima and on 181 previous photographic and visual minima covering a time base of 80 yr gives a period change of P= -0.016 s yr-1. The Wilson-Devinney analysis leads to a solution of a semi-detached configuration. The primary component is a 'normal' F2 V star filling its Roche lobe. The secondary one is a K5 - K7 object overluminous and oversized as compared with a main-sequence star, but fractionally smaller than its lobe. A hot area on the following hemisphere of the secondary component could account for the observed asymmetries in the light curve. The conservative mass transfer as inferred from the observed P/P is M= -1.3x10-7M_sun;yr-1.

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