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Contact binaries at the short period cut-off - I. Statistics and the first photometric investigations of 10 totally eclipsing systems
Li, Kai1,2; Xia, Qi-Qi1; Michel, Raul3; Hu, Shao-Ming1; Guo, Di-Fu1; Gao, Xing4; Chen, Xu1; Gao, Dong-Yang1
2019-06-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume485Issue:4Pages:4588-4600
Contribution Rank4
AbstractThe 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.
Keywordbinaries: close binaries: eclipsing stars: evolution stars: statistics
DOI10.1093/mnras/stz715
Indexed BySCI
Language英语
WOS KeywordLIGHT-CURVE SOLUTIONS ; STAR LIGHT ; EVOLUTIONARY STATE ; VARIABLE-STARS ; MASS ; CATALOG ; LIMIT ; VELOCITY
Funding ProjectChinese 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000474880400012
PublisherOXFORD UNIV PRESS
Funding OrganizationChinese Natural Science Foundation ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; Natural Science Foundation of Shandong Province ; Young Scholars Program of Shandong University, Weihai ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects ; project UNAM PAPIIT ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Development and Reform Commission ; WHOT
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/2885
Collection中国科学院新疆天文台
Corresponding AuthorLi, Kai
Affiliation1.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China
2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650216, Yunnan, Peoples R China
3.Univ Nacl Autonoma Mexico, Inst Astron, Observ Astron Nacl, Apartado Postal 877, Ensenada 22830, BC, Mexico
4.Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
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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