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Magnetic Activity and Period Variation Studies of the Four W Uma-type Eclipsing Binaries: UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107
Lu, Hong-peng1,2; Zhang, Li-yun1,3; Michel, Raul4; Han, Xianming L.1,5
Source PublicationASTROPHYSICAL JOURNAL
2020-10-01
Volume901Issue:2Pages:23
DOI10.3847/1538-4357/abb19b
Indexed BySCI
Abstract

We present new photometric data and LAMOST spectra for the W UMa binaries UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107. The orbital and starspot parameters are obtained using the Wilson-Devinney program. Comparing the starspot parameters at different times, there are magnetic activities in these four binaries. The orbital period of UV Lyn is increasing at a rate of dP/dt = +8.9(5) x 10(-8) days yr(-1), which maybe due to mass transfer from the less massive component to the more massive component (dM(1)/dt = -6.4 x 10(-8) M-circle dot yr(-1)). The period variation of 2MASS J15471055+5302107 is also increasing at a rate of 6.0(4) x 10(-7) days yr(-1), which can be explained by mass transfer from the less massive component to the more massive component (dM(1)/dt = -2.8 x 10(-7) M-circle dot yr(-1)). The period variation of V781 Tau presents the downward parabola superimposed the cyclic oscillation. The period of V781 Tau is decreasing (dP/dt = -3.2(4) x 10(-8) days yr(-1)), which can be explained by mass transfer from the more massive component to the less massive component (dM(2)/dt = -2.2 x 10(-8) M-circle dot yr(-1)). The cyclic oscillation may be due to the magnetic activity with a period of 30.8(5) yr rather than a third body. The period variation of NSVS 4484038 also shows the cyclic oscillation, which could be explained by the magnetic activity with 10.8(1) yr or a black hole candidate. Interestingly, there is a depth variation between the light minimum times of NSVS 4484038, which may also be caused by stellar magnetic activity.

Funding ProjectChina Scholarship Fund ; Joint Fund of Astronomy of the NSFC ; CAS[11963002] ; CAS[U1631236] ; CAS[U1431114] ; Universidad Nacional Autonoma de Mexico (UNAM)[PAPIIT IN 100918] ; DGAPA[PAPIIT IN 100918] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
Funding OrganizationChina Scholarship Fund ; Joint Fund of Astronomy of the NSFC ; CAS[11963002, U1631236, U1431114] ; Universidad Nacional Autonoma de Mexico (UNAM)[PAPIIT IN 100918] ; DGAPA[PAPIIT IN 100918] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000587970900001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE-MAJORIS SYSTEMS ; RADIAL-VELOCITY ; STAR LIGHT ; VARIABLE-STAR ; MODEL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23951
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorZhang, Li-yun
Affiliation1.College of Physics & Guizhou Provincial Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, People's Republic of China
2.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
4.Observatorio Astronómico Nacional, Universidad Nacional Autónoma de México, Apartado Postal 877, C.P. 22800 Ensenada, B.C., Mexico
5.Dept. of Physics and Astronomy, Butler University, Indianapolis, IN 46208, USA
Recommended Citation
GB/T 7714
Lu, Hong-peng,Zhang, Li-yun,Michel, Raul,et al. Magnetic Activity and Period Variation Studies of the Four W Uma-type Eclipsing Binaries: UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107[J]. ASTROPHYSICAL JOURNAL,2020,901(2):23.
APA Lu, Hong-peng,Zhang, Li-yun,Michel, Raul,&Han, Xianming L..(2020).Magnetic Activity and Period Variation Studies of the Four W Uma-type Eclipsing Binaries: UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107.ASTROPHYSICAL JOURNAL,901(2),23.
MLA Lu, Hong-peng,et al."Magnetic Activity and Period Variation Studies of the Four W Uma-type Eclipsing Binaries: UV Lyn, V781 Tau, NSVS 4484038, and 2MASS J15471055+5302107".ASTROPHYSICAL JOURNAL 901.2(2020):23.
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