FS LUPI - A contact binary in poor thermal contact

Details FS LUPI - A contact binary in poor thermal contact FS LUPI - A contact binary in poor thermal contact

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183..265m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 2, Sept. 1987, p. 265-273.

Astronomy and Astrophysics

Astrophysics

5

A Stars, Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Stellar Temperature, Astronomical Catalogs, Electrophotometry, Frequency Distribution, Spectrum Analysis, Ubv Spectra

Scientific paper

The UBV photoelectric lightcurves of the eclipsing binary FS Lupi, observed at ESO, La Silla, during 1982 - 1984, have been analyzed with a Roche-model-based lightcurve synthesis method. The system, alternatively classified in the past as an EA or EB system, results an A-type contact binary with a relatively large degree of overcontact (33%) and with a large difference in the temperatures of the components (1120K), which explains the EB-type light curve. The asymmetries and the large scatter of the observed data, when investigated in terms of deviations from the (synthetic) mean light curve, show a systematic trend which has been studied with three different methods, searching for periodicity.

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