The First Photometric and Period Investigation of the Total Eclipse Binary System V0474 Cam
Guo, D. F.1; Li, K.1,2; Hu, S. M.1; Chen, X.1; Li, K., Email: kaili@sdu.edu.cn
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
2018-06-01
卷号130期号:988
DOI10.1088/1538-3873/aaba50
收录类别SCI
关键词(Stars:) Binaries (Including Multiple): Close (Stars:) Binaries: Eclipsing Stars: Evolution Stars: Individual (V0474 Cam)
摘要Three complete multi-band light curves of the W UMa-type binary V0474 Cam, which display a total eclipse, were obtained on four nights during two observing seasons from 2016 February 9 to 2017 February 24. By analyzing all obtainable times of light minimum, including 8 newly calculated, a downward parabolic change was found to be overlaid with a possible cyclic oscillation. The secular period decrease is determined to be dP/dt = -9.42 x 10(-7) days yr(-1), which can be explained by the existence of angular momentum loss from the binary system via a magnetic stellar wind. The cyclic oscillation, with a 3.44-yr period and a 0.0015-days amplitude, could be explained more plausibly by the magnetic activity, although the light-travel time effect as result of the present of a third component cannot be excluded. According to the three complete light curves, the intrinsic variations are obvious, particularly in the deepness at primary minimum and in the phase around 0.75. The light curve of V0474 Cam is symmetric observed in February 2016, then it become asymmetric in December 2016 and February 2017. The W-D program was adopted to investigate the multi-band light curves and the results indicate V0474 Cam is a W-subtype binary (the less massive component is hotter). A mass ratio of q = 3.230 was derived by analyzing the symmetric light curves observed at February in 2016. After accepting the results derived from the symmetric light curves as the references, other two sets of asymmetrical light curves can be well resolved through adding a cool spot on the more massive component.
项目资助者Chinese Natural Science Foundation(11703016) ; National Natural Science Foundation of China (NSFC)(U1431105) ; Chinese Academy of Sciences (CAS)(U1431105) ; Young Scholars Program of Shandong University, Weihai(2016WHWLJH07) ; Natural Science Foundation of Shandong Province(ZR2014AQ019, ZR2017PA009) ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects(OP201704)
语种英语
学科领域天文学
文章类型Article
ISSN0004-6280
URL查看原文
WOS记录号WOS:000434429300001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ANGULAR-MOMENTUM ; VELOCITY CURVES ; CLOSE BINARIES ; LIGHT CURVES ; STAR LIGHT ; CONTACT ; MASS ; MODULATION ; DISCOVERY ; DEEP
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12398
专题中国科学院天体结构与演化重点实验室
通讯作者Li, K., Email: kaili@sdu.edu.cn
作者单位1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People's Republic of China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, People's Republic of China
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Guo, D. F.,Li, K.,Hu, S. M.,et al. The First Photometric and Period Investigation of the Total Eclipse Binary System V0474 Cam[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2018,130(988).
APA Guo, D. F.,Li, K.,Hu, S. M.,Chen, X.,&Li, K., Email: kaili@sdu.edu.cn.(2018).The First Photometric and Period Investigation of the Total Eclipse Binary System V0474 Cam.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,130(988).
MLA Guo, D. F.,et al."The First Photometric and Period Investigation of the Total Eclipse Binary System V0474 Cam".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 130.988(2018).
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