Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..431t&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 2, June 1983, p. 431-445. Research supported by the Scientific and
Astronomy and Astrophysics
Astronomy
17
Eclipsing Binary Stars, Light Curve, Peculiar Stars, Radio Sources (Astronomy), Stellar Spectrophotometry, Brightness Distribution, Mass Transfer, Periodic Variations, Tables (Data)
Scientific paper
The authors present observations of the peculiar eclipsing binary RT Lac, which were obtained in 1980 and 1981. Examining the light curves obtained in successive four years, they estimate the period of the migrating light curve distortion to be about four years. The orbital period of the system was also found to be decreasing with an amount 34 s century-1. The brightnesses both of the primary and the secondary are changing with time, which is clearly seen from the last light curve. The variations occurred at the primary eclipse are three times greater than at the secondary eclipse. Therefore, it is suggested that the star which is in front at the primary eclipse, is more responsible for the distorted light curves and it should be the earlier spectral type and also the smaller one.
Ertan A. Y.
Evren Serdar
Ibanoglu Cafer
Tumer O.
Tunca Zeynel
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