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Title: | Marginally Low Mass Ratio Close Binary System V1191 Cyg | Authors: | Ulaş, B. Kalomeni, Belinda Keskin, Varol Köse, O. Yakut, Kadri |
Keywords: | Stars Eclipsing Fundamental parameters V1191 Cyg |
Publisher: | Elsevier Ltd. | Source: | Ulaş, B., Kalomeni, B., Keskin, V., Köse, O., and Yakut, K. (2012). Marginally low mass ratio close binary system V1191 Cyg. New Astronomy, 17(1), 46-49. doi:10.1016/j.newast.2011.06.002 | Abstract: | In this study, we present photometric and spectroscopic variations of the extremely small mass ratio (q ≃ 0.1) late-type contact binary system V1191 Cyg. The parameters for the hot and cooler companions have been determined as Mh = 0.13 (1) M⊙, Mc = 1.29 (8) M ⊙, Rh = 0.52 (15) R⊙, Rc = 1.31 (18) R⊙, Lh = 0.46 (25) L⊙, Lc = 2.71 (80) L⊙, the separation of the components is a = 2.20 (8) R⊙ and the distance of the system is estimated as 278 (31) pc. Analyses of the times of minima indicates a period increase of dPdt=1.3(1)×10-6days/yr that reveals a very high mass transfer rate of dMdt=2.0(4)×10-7M⊙/yr from the less massive component to the more massive one. New observations show that the depths of the minima of the light curve have been interchanged. © 2011 Elsevier B.V. All rights reserved. | URI: | http://doi.org/10.1016/j.newast.2011.06.002 http://hdl.handle.net/11147/4801 |
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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