SX Piscium: A near-contact mass-transferring binary with a possible brown dwarf companion
文献类型:期刊论文
作者 | Wang ZH(王志华)1,2,3,4; Zhu LY(朱俐颖)1,2,3,4 |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
出版日期 | 2019-10-01 |
卷号 | 71期号:5页码:9 |
ISSN号 | 0004-6264 |
关键词 | binaries: close binaries: eclipsing stars: individual (SX Piscium) |
DOI | 10.1093/pasj/psz086 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | SX Psc is a short-period Algol-type eclipsing binary whose photometric analysis has long been ignored. Our photometric monitoring of this target covered from 2001 December to 2018 November. Aside from some curves observed at the primary eclipses, the complete four-color light curves in the BVRcIc band were also obtained. Photometric solutions were determined based on the Wilson-Devinney method. It is found that SX Psc is a semidetached binary where the inner Roche lobe of the secondary component has been filled. The filling factor for the primary is about 85% along with an inclination of , indicating that it is a near-contact total eclipsing binary system. Meanwhile, analysis of the O - C curve revealed that the orbital period is increasing continuously at a rate of dP/dt = 4.64(4) x 10(-8)dyr(-1). This is due to the mass transfers from the secondary to the primary component, which is in accord with the semidetached configuration of this binary star. With the assumption of conservative evolution, the mass transfer rate is estimated as 1.96 x 10(-8) M-circle dot yr(-1). By deducting the long-term increasing trend in the O - C diagram, the high-precision data exhibits a cyclic variation, whereas it might be caused by the Applegate mechanism. Moreover, according to the light travel-time effect, there should be a candidate brown dwarf with a mass of no less than orbiting the eclipsing binary. This is perhaps a unique case for an Algol-type binary accompanied by a substellar object. |
学科主题 | 天文学 ; 恒星与银河系 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | ANGULAR-MOMENTUM LOSS ; ALGOL-TYPE BINARIES ; ORBITAL PERIOD MODULATION ; DELPHINI ; SYSTEM |
资助项目 | National Natural Science Foundation of China[11573063] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS "Light of West China" Program ; CAS Interdisciplinary Innovation Team |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000491241500002 |
资助机构 | National Natural Science Foundation of China[11573063] ; Key Science Foundation of Yunnan Province[2017FA001] ; CAS "Light of West China" Program ; CAS Interdisciplinary Innovation Team |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21402] |
专题 | 云南天文台_双星与变星研究组 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 | Wang ZH(王志华) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China 4.University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Wang ZH,Zhu LY. SX Piscium: A near-contact mass-transferring binary with a possible brown dwarf companion[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2019,71(5):9. |
APA | Wang ZH,&Zhu LY.(2019).SX Piscium: A near-contact mass-transferring binary with a possible brown dwarf companion.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,71(5),9. |
MLA | Wang ZH,et al."SX Piscium: A near-contact mass-transferring binary with a possible brown dwarf companion".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 71.5(2019):9. |
入库方式: OAI收割
来源:云南天文台
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