Period and Light-Curve Study of the Eclipsing Contact Binary SW Lac

Details Period and Light-Curve Study of the Eclipsing Contact Binary SW Lac Period and Light-Curve Study of the Eclipsing Contact Binary SW Lac

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999coska..29..111p&link_type=abstract

Contributions of the Astronomical Observatory, vol. 29, p. 111

Other

19

Eclipsing Binary Stars, Light Curve, Electrophotometry, Mathematical Models, Minima, Ephemeris Time, Three Dimensional Models

Scientific paper

New photoelectric U,B and V observations of the eclipsing contact binary SW Lac were taken in 1998 and nine new minima times were determined. The (0-C) diagram constructed using photographic and photoelectric minima times can be explained by a secular increase of the period combined with a light-time effect due to the presence of another two bodies in the system with orbital periods P3 = 23 and P4 approx. 90 years. The minimum masses of these bodies are M3 = 0.41 plus or minus 0.03 M and M4 = 1.47 plus or minus 0.03 M. Photometric elements of the contact binary are given.

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