Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..67..129c&link_type=abstract
Astrophysics and Space Science, vol. 67, no. 1, Jan. 1980, p. 129-135.
Astronomy and Astrophysics
Astrophysics
8
Eclipsing Binary Stars, Periodic Variations, Secular Variations, Stellar Motions, Variable Stars, Mass Transfer, Stellar Mass, Stellar Models, Three Body Problem
Scientific paper
The O-C curve of SW Cyg between 1880 and 1977 is presented and discussed. It is found that the orbital period undergoes a systematic change, becoming greater with time. In addition, a periodic oscillation of amplitude 0.015 days with period of 43.8 years is superimposed on this general trend. It is concluded that the increase in the period is due to a transfer of mass from the secondary star to the primary and the periodic oscillation is due to the light time effect of the third body of mass function f(m) = 0.006 solar mass.
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