中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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)
DOI10.1093/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

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。