Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5262
Title: Close binary system GO Cyg
Authors: Ulaş, Burak
Kalomeni, Belinda
Keskin, Varol
Köse, O.
Yakut, Kadri
Kalomeni, Belinda
Izmir Institute of Technology. Physics
Keywords: Stars
Binaries
Eclipsing
Roche lobe
Fundamental parameters
Issue Date: Apr-2012
Publisher: Elsevier Ltd.
Source: Ulaş, B., Kalomeni, B., Keskin, V., Köse, O. and Yakut, K. (2012). Close binary system GO Cyg. New Astronomy, 17(3), 296-302. doi:10.1016/j.newast.2011.09.002
Abstract: In this study, we present long term photometric variations of the close binary system GO Cyg. Modelling of the system shows that the primary is filling Roche lobe and the secondary of the system is almost filling its Roche lobe. The physical parameters of the system are M1 = 3.0 ± 0.2M ⊙, M2 = 1.3 ± 0.1M⊙, R 1 = 2.50 ± 0.12R⊙, R2 = 1.75 ± 0.09R⊙, L1 = 64 ± 9L ⊙, L2 = 4.9 ± 0.7L⊙, and a = 5.5 ± 0.3R⊙. Our results show that GO Cyg is the most massive system near contact binary (NCB). Analysis of times of the minima shows a sinusoidal variation with a period of 92.3 ± 0.5 yr due to a third body whose mass is less than 2.3M⊙. Finally a period variation rate of -1.4 × 10-9 d/yr has been determined using all available light curves.
URI: http://dx.doi.org/10.1016/j.newast.2011.09.002
http://hdl.handle.net/11147/5262
ISSN: 1384-1092
1384-1076
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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