Photometric studies for two contact binaries: V532 Monocerotis and GU Orionis
Yang, Yuangui1; Dai, Haifeng1; Yuan, Huiyu1; Zhang XL(张西亮)2; Zhang, Liyun3; Yang, Yuangui(Huaibei Normal Univ, Informat Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China)
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017-08-01
卷号69期号:4
DOI10.1093/pasj/psx049
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual (V532 Monocerotis Gu Orionis)
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.
项目资助者Natural Science Foundation of China(11473009, U1231102, U1431114) ; Anhui Provincial Department of Education(KJ2017A850)
语种英语
学科领域天文学
文章类型Article
ISSN0004-6264
URL查看原文
WOS记录号WOS:000410491300012
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; ECLIPSING BINARIES ; LIGHT CURVES ; VELOCITY CURVES ; STAR LIGHT ; CATALOG
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11928
专题中国科学院天体结构与演化重点实验室
通讯作者Yang, Yuangui(Huaibei Normal Univ, Informat Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China)
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
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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,&Yang, Yuangui.(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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