Photometric studies for two contact binaries: V532 Monocerotis and GU Orionis | |
Yang, Yuangui1![]() ![]() ![]() | |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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2017-08-01 | |
卷号 | 69期号:4 |
关键词 | binaries: close binaries: eclipsing stars: individual (V532 Monocerotis, GU Orionis) |
ISSN号 | 0004-6264 |
DOI | 10.1093/pasj/psx049 |
文献子类 | Article |
英文摘要 | We present photometry and spectroscopy data for V532 Mon and GU Ori, observed in 2011 and 2016. From the spectral observations, the spectral types are determined to be F5V for V532 Mon and G0V for GU Ori. With the 2015-version Wilson-Devinney program, the photometric solutions are simultaneously deduced from VR light curves (LCs). The intrinsic variability for V532 Mon is found by comparing LCs in 2004 and 2011, while the asymmetric LCs for GU Ori are modeled by a cool spot on the more massive component. The results imply that the two stars are A-type contact binaries. The mass ratios and fill-out factors are, respectively, q = 0.190(+/- 0.006) and f = 43.7(+/- 0.9)% for V532 Mon and q = 0.455(+/- 0.020) and f = 26.9(+/- 1.3)% for GU Ori. From the (O - C) curves, it is found that their orbital periods may be undergoing long-term variations. The rates of period change are dP/dt = -1.72(+/- 0.05) x 10(-7) dyr(-1) for V532 Mon and dP/dt = +1.45(+/- 0.01) x 10(-7) dyr(-1) for GU Ori. V532 Mon with a decreasing period will evolve into a deep-contact binary, while GU Ori with an increasing period may evolve into a broken-contact case. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | Natural Science Foundation of China[11473009] ; Natural Science Foundation of China[U1231102] ; Natural Science Foundation of China[U1431114] ; Anhui Provincial Department of Education[KJ2017A850] |
WOS关键词 | URSAE MAJORIS SYSTEMS ; ECLIPSING BINARIES ; LIGHT CURVES ; VELOCITY CURVES ; STAR LIGHT ; CATALOG |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000410491300012 |
资助机构 | binaries: close ; binaries: eclipsing ; stars: individual (V532 Monocerotis, GU Orionis) |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/11928] ![]() |
专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Yang, Yuangui |
作者单位 | 1.Information College/School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, Anhui Province, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Department of Physics and Astronomy, College of Physics, Guizhou University, Guiyang 550025, China |
推荐引用方式 GB/T 7714 | Yang, Yuangui,Dai, Haifeng,Yuan, Huiyu,et al. Photometric studies for two contact binaries: V532 Monocerotis and GU Orionis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(4). |
APA | Yang, Yuangui,Dai, Haifeng,Yuan, Huiyu,Zhang XL,&Zhang, Liyun.(2017).Photometric studies for two contact binaries: V532 Monocerotis and GU Orionis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,69(4). |
MLA | Yang, Yuangui,et al."Photometric studies for two contact binaries: V532 Monocerotis and GU Orionis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69.4(2017). |
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