Orbital Period Changes and Long Term Luminosity Variation in Active Binary CG Cyg |
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| Authors: | D M Z Jassur M H Kermani G Gozaliasl |
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| Institution: | (1) Department of Theoretical Physics and Astrophysics, Tabriz, University, Tabriz, 51664, Iran;(2) Research Institute for Applied Physics and Astronomy, Tabriz, 51664, Iran |
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| Abstract: | UBV photometric observations of the active binary star CG Cygnus have been presented and analyzed to obtain absolute parameters of both components. Updated O-C diagram analysis by Kalimeris method yielded the values of 1.55× 10-6 day and 1.4×10-7day as the amplitudes of orbital period modulation, and Pmod1∼ 52.3 yr and Pmod2 ∼ 15.9 yr as the modulation periodicities. Finally, the consequences of period changes have been discussed on the basis of Applegate mechanism. |
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| Keywords: | CG Cyg Eclipsing binary Period variations |
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