Eclipsing binary XZ CMi in a hierarchical quadruple system | |
Wang ZH(王志华)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4 | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
2020-08-01 | |
卷号 | 20期号:8页码:9 |
关键词 | binaries close binaries eclipsing stars individual (XZ CMi) |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/20/8/133 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | The new completeBVR(c)I(c)light curves and spectra of the short-period eclipsing binary XZ CMi are presented. The results from the combined analysis based on the photometric and spectroscopic data show that XZ CMi is a near contact binary with the secondary component filling its critical Roche lobe while the primary filling 91% of its Roche lobe. The investigation of theO-Cdiagram reveals that its orbital period is continuously increasing, which is consistent with the derived configuration and caused by the mass transfer from the less massive star to the more massive one. In addition, an obvious periodic modulation with the amplitude of0.0187(+/- 0.0016) d and a high eccentric of 0.86(+/- 0.04) is detected, which could be the results of the light time effect as a third star with the mass no less than 0.42(+/- 0.09)M(circle dot)orbiting around the central eclipsing binary once every 95.7(+/- 2.1) yr. Furthermore, we found a visual companion star at 2.4" east by south of this system at a much greater distance by direct image. The large third light contribution found from the light curve analysis could be well explained by the existence of the third star and the fourth visual one. The similar parallax and proper motion imply that the components of this hierarchical quadruple system might be bounded by gravitation. Spectroscopic observations for two visual components were carried out by the LAMOST and 2.16 m telescopes, respectively. Their different values of [Fe/H] suggest that they were not born from the same origin. Thus, XZ CMi system is an interesting and important target to study the formation of the multiple stars. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | CHIN ACAD SCIENCES, 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA |
资助项目 | National Natural Science Foundation of China[11922306] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS Interdisciplinary Innovation Team ; National Development and Reform Commission |
WOS关键词 | ORBITAL PERIOD MODULATION ; CONTACT BINARY ; PHOTOMETRIC-OBSERVATIONS ; MASS-TRANSFER ; LIGHT CURVES ; STAR LIGHT ; COMPANION ; ELEMENTS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
WOS记录号 | WOS:000563440600001 |
资助机构 | National Natural Science Foundation of China[11922306] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS Interdisciplinary Innovation Team ; National Development and Reform Commission |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23671] |
专题 | 云南天文台_双星与变星研究组 |
通讯作者 | Wang ZH(王志华) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China |
推荐引用方式 GB/T 7714 | Wang ZH,Zhu LY. Eclipsing binary XZ CMi in a hierarchical quadruple system[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(8):9. |
APA | Wang ZH,&Zhu LY.(2020).Eclipsing binary XZ CMi in a hierarchical quadruple system.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(8),9. |
MLA | Wang ZH,et al."Eclipsing binary XZ CMi in a hierarchical quadruple system".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.8(2020):9. |
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