FS LUPI : a contact binary in poor thermal contact.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1987
- Bibcode:
- 1987A&A...183..265M
- Keywords:
-
- A Stars;
- Eclipsing Binary Stars;
- Light Curve;
- Stellar Spectrophotometry;
- Stellar Temperature;
- Astronomical Catalogs;
- Electrophotometry;
- Frequency Distribution;
- Spectrum Analysis;
- Ubv Spectra;
- Astrophysics