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The low-mass classic Algol-type binary UU Leo revisited
Yang, Yuan-Gui1,2
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2013-12
Volume13Issue:12Pages:1471-1481
DOI10.1088/1674-4527/13/12/008
Indexed BySCI
KeywordStars (Including Multiple): Binaries: Close Stars: Individual (Uu Leo)
Abstract

New multi-color photometry of the eclipsing binary UU Leo, acquired from 2010 to 2013, was carried out by using the 60-cm and 85-cm telescopes at the Xinglong station, which is administered by National Astronomical Observatories, Chinese Academy of Sciences. With the updated Wilson-Devinney code, the photometric solution was derived from BV R light curves. The results imply that UU Leo is a semi-detached Algol-type binary, with a mass ratio of q = 0.100 (+/- 0.002). The change in orbital period was reanalyzed based on all available eclipsing times. The O - C curve could be described by an upward parabola superimposed on a quasi-sinusoidal curve. The period and semi-amplitudes are P-mod = 54.5 (+/- 1.1) yr and A = 0.0273(d) (+/- 0.0015(d)), which may be attributed to the light-time effect via the presence of an invisible third body. The long-term period increases at a rate of dP/d t = +4.64(+/- 0.14) x 10(-7) d yr(-1), which may be interpreted by the conserved mass being transferred from the secondary to the primary. With mass being transferred, the low-mass Algol-type binary UU Leo may evolve into a binary system with a main sequence star and a helium white dwarf.

Funding ProjectNational Natural Science Foundation of China[U1231102] ; National Natural Science Foundation of China[11133007] ; Anhui Provincial Natural Science Foundation[1208085MA04] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201110] ; Anhui Provincial Foundation for Academic ; Technological Leader Reserver Candidates
Funding OrganizationNational Natural Science Foundation of China[U1231102, 11133007] ; Anhui Provincial Natural Science Foundation[1208085MA04] ; Open Research Program of Key Laboratory for the Structure and Evolution of Celestial Objects[OP201110] ; Anhui Provincial Foundation for Academic ; Technological Leader Reserver Candidates
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000327875500008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordORBITAL PERIOD ; CLOSE BINARIES ; LIGHT CURVES ; STARS ; CATALOG ; CVN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9416
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorYang, Yuan-Gui
Affiliation1.School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, China
2.Key Laboratory of the Structure and Evolutionary of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China
Recommended Citation
GB/T 7714
Yang, Yuan-Gui. The low-mass classic Algol-type binary UU Leo revisited[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(12):1471-1481.
APA Yang, Yuan-Gui.(2013).The low-mass classic Algol-type binary UU Leo revisited.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(12),1471-1481.
MLA Yang, Yuan-Gui."The low-mass classic Algol-type binary UU Leo revisited".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.12(2013):1471-1481.
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