YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
Photometric and Spectroscopic Studies of Four New Low-mass M-type Eclipsing Binaries
Long, Liu1,2; Zhang, Li-Yun1,2,5; Han, Xianming L.1,2,3; Lu, Hong-Peng1,2; Pi, Qing-feng4; Yue, Qiang1,2
Source PublicationASTRONOMICAL JOURNAL
2018-11-01
Volume156Issue:5Pages:12
DOI10.3847/1538-3881/aae3ea
Indexed BySCI
Keywordbinaries: eclipsing starspots stars: individual (HAT 225-03429,individual CRTS J085623.0+282620, CRTS J110302.4+201611, 2MASS J163)
Abstract

We performed multicolor photometric and spectroscopic observations of four new low-mass M-type eclipsing binaries (HAT 225-03429, CRTS J085623.0+282620, CRTS J110302.4+201611, 2MASS J16344899+3716423) in 2017. We obtained new VRI light curves and minimum times of these four systems. Based on our minimum times, we updated the orbital periods and the linear ephemerides using the least squares method. We analyzed these four systems using the Wilson-Devinney program, and obtained the orbital and starspot parameters. The results of our analysis of the light curves indicate that HAT 225-03429 and CRTS J085623.0+282620 are detached eclipsing binaries, CRTS J110302.4+201611 is a semi-detached eclipsing binary, and 2MASS J16344899+3716423 is a contact binary. We performed LAMOST spectroscopic studies of chromospheric activity indicators (H-alpha, H-beta, H-gamma, H-delta, and Ca II H&K lines) for these four systems for the first time. We first determined their spectral types and calculated the equivalent widths of their chromospheric active indicators. These indicators show that the four low-mass M-type eclipsing binaries are active. Furthermore, the radii of these stars are notably larger than model predictions for their masses, except for the secondary component of HAT 225-03429 and the primary component of CRTS J110302.4+201611.

Funding ProjectNSFC[U1631236] ; NSFC[U1431114] ; CAS[U1631236] ; CAS[U1431114]
Funding OrganizationNSFC[U1631236, U1431114] ; CAS[U1631236, U1431114]
Language英语
Subject Area天文学 ; 天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
WOS IDWOS:000448499800001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDIGITAL SKY SURVEY ; WFCAM TRANSIT SURVEY ; STELLAR EVOLUTION MODELS ; LAMOST SPECTRAL SURVEY ; LOWER MAIN-SEQUENCE ; M-DWARF BINARY ; MAGNETIC ACTIVITY ; ABSOLUTE DIMENSIONS ; LIGHT CURVES ; CHROMOSPHERIC ACTIVITY
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/18308
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/Department of Physics and Astronomy & Guizhou Provincial Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, People's Republic of China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
3.Dept. of Physics and Astronomy and SARA, Butler University, Indianapolis, IN 46208, USA
4.Department of Astronomy, Beijing Normal University, Beijing, 100875, People's Republic of China
5.Author to whom any correspondence should be addressed.
Recommended Citation
GB/T 7714
Long, Liu,Zhang, Li-Yun,Han, Xianming L.,et al. Photometric and Spectroscopic Studies of Four New Low-mass M-type Eclipsing Binaries[J]. ASTRONOMICAL JOURNAL,2018,156(5):12.
APA Long, Liu,Zhang, Li-Yun,Han, Xianming L.,Lu, Hong-Peng,Pi, Qing-feng,&Yue, Qiang.(2018).Photometric and Spectroscopic Studies of Four New Low-mass M-type Eclipsing Binaries.ASTRONOMICAL JOURNAL,156(5),12.
MLA Long, Liu,et al."Photometric and Spectroscopic Studies of Four New Low-mass M-type Eclipsing Binaries".ASTRONOMICAL JOURNAL 156.5(2018):12.
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