中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Contact binaries at the short period cut-off - I. Statistics and the first photometric investigations of 10 totally eclipsing systems

文献类型:期刊论文

作者Li, Kai1,2; Xia, Qi-Qi1; Michel, Raul3; Hu, Shao-Ming1; Guo, Di-Fu1; Gao, Xing4; Chen, Xu1; Gao, Dong-Yang1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-06-01
卷号485期号:4页码:4588-4600
ISSN号0035-8711
关键词binaries: close binaries: eclipsing stars: evolution stars: statistics
DOI10.1093/mnras/stz715
文献子类Article
英文摘要

The period distribution of contact binaries exhibits a very sharp short period cut-off at 0.22 d. In order to provide valuable information on this short period limit, we observed 10 totally eclipsing contact binaries with orbital periods near this cut-off. By detailed analysis using the W-D code, we determined that two of these systems are A-subtype contact binaries while the others areW-subtype contact binaries and all the targets show shallow contact configurations. Half of the targets exhibit stellar spot activity and four of them have third light. A statistical work on well-studied ultrashort period contact binaries (USPCBs) was carried out, and physical parameters of 55 USPCBs were obtained. Some common properties for these systems were derived. Due to the study of the period-colour diagram of USPCBs, we found that the period-colour relation of USPCBs is different from other W UMa type contact binaries and USPCBs are metal-poor old stars. In addition, the evolutionary states of these systems were discussed by constructing the colour-density diagram. We derived that the evolutionary states of the two components of USPCBs show identical characteristics of other contact binaries despite a slower evolutionary status caused by smallermass. We suggested that both the fully convective limit claimed by Rucinski and the angular momentum loss theory recommended by Stepien can produce the short period cut-off and a tertiary companion is very important during the formation of the short period contact binaries by removing angular momentum from the host eclipsing pairs under certain circumstances.

学科主题天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
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出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词LIGHT-CURVE SOLUTIONS ; STAR LIGHT ; EVOLUTIONARY STATE ; VARIABLE-STARS ; MASS ; CATALOG ; LIMIT ; VELOCITY
资助项目Chinese Natural Science Foundation[11703016] ; National Natural Science Foundation of China (NSFC)[U1431105] ; Chinese Academy of Sciences (CAS)[U1431105] ; Natural Science Foundation of Shandong Province[ZR2014AQ019] ; Natural Science Foundation of Shandong Province[ZR2017PA009] ; Natural Science Foundation of Shandong Province[ZR2017PA010] ; Natural Science Foundation of Shandong Province[JQ201702] ; Young Scholars Program of Shandong University, Weihai[20820162003] ; Young Scholars Program of Shandong University, Weihai[20820171006] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201704] ; project UNAM PAPIIT[IN100918] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Development and Reform Commission ; WHOT
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000474880400012
资助机构Chinese Natural Science Foundation[11703016] ; National Natural Science Foundation of China (NSFC)[U1431105] ; Chinese Academy of Sciences (CAS)[U1431105] ; Natural Science Foundation of Shandong Province[ZR2014AQ019, ZR2017PA009, ZR2017PA010, JQ201702] ; Young Scholars Program of Shandong University, Weihai[20820162003, 20820171006] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201704] ; project UNAM PAPIIT[IN100918] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Development and Reform Commission ; WHOT
源URL[http://ir.ynao.ac.cn/handle/114a53/20548]  
专题云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Li, Kai
作者单位1.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, 264209, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, P.O. Box 110, 650216, China
3.Observatorio Astronomico Nacional, Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apartado Postal 877, Ensenada, B.C. 22830, Mexico
4.Xinjiang Astronomical Observatory, 150 Science 1-Street, Urumqi 830011, China
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Li, Kai,Xia, Qi-Qi,Michel, Raul,et al. Contact binaries at the short period cut-off - I. Statistics and the first photometric investigations of 10 totally eclipsing systems[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(4):4588-4600.
APA Li, Kai.,Xia, Qi-Qi.,Michel, Raul.,Hu, Shao-Ming.,Guo, Di-Fu.,...&Gao, Dong-Yang.(2019).Contact binaries at the short period cut-off - I. Statistics and the first photometric investigations of 10 totally eclipsing systems.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(4),4588-4600.
MLA Li, Kai,et al."Contact binaries at the short period cut-off - I. Statistics and the first photometric investigations of 10 totally eclipsing systems".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.4(2019):4588-4600.

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