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NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS
Yang, Yuan-Gui1,2; Dai, Hai-Feng1,2; Zhou, Zheng1; Li, Qun1
Source PublicationASTRONOMICAL JOURNAL
2016-05-01
Volume151Issue:5
DOI10.3847/004-6256/151/5/124
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing stars: individual (AR Dra, IZ Mon)
Abstract

We present multi-color photometric observations for two neglected near-contact binaries, IZ Mon (P = 0(d).177980) and AR Dra (P = c(d). 67584). By the aid of the updated W -D analysis code, the photometric solutions were deduced from the multi -color light curves (LCs). IZ Mon is a semi-detached binary with a mass ratio of q = 0.388(0.002), while AR Dra is a detached star with a mass ratio of q = 0.652( 0.002). The asymmetric LCs of IZ Mon were modeled by a hot spot on the secondary's surface, which may be attributed to mass transfer from the primary. Based on all collected eclipse times for two systems, we constructed their timing residual curves. The orbital period for IZ Mon may be continuously decreasing at a rate of dP/dt = 2.06(0.04) days yr 1, which may result from mass and angular momentum loss from the central system. For AR Dra, there exists a cyclic variation with a period of P-3 = 104.9(+/- 2.9) yr due to light-time orbit effect via the presence of the third body, whose mass is more than 0 28 (+/- 0.02) M-circle dot. Finally, two near-contact binaries, IZ Mon and AR Dra, will evolve into contact binaries.

Funding ProjectNatural Science Foundation of China[11473009] ; Natural Science Foundation of China[U1131102] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201407]
Funding OrganizationNatural Science Foundation of China[11473009, U1131102] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201407]
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
ISSN0004-6256
URL查看原文
WOS IDWOS:000375610400015
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordURSAE MAJORIS SYSTEMS ; ECLIPSING BINARIES ; EVOLUTION ; STARS ; TAURI
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9589
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/Information College, Huaibei Normal University, Huaibei 235000, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
Recommended Citation
GB/T 7714
Yang, Yuan-Gui,Dai, Hai-Feng,Zhou, Zheng,et al. NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS[J]. ASTRONOMICAL JOURNAL,2016,151(5).
APA Yang, Yuan-Gui,Dai, Hai-Feng,Zhou, Zheng,&Li, Qun.(2016).NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS.ASTRONOMICAL JOURNAL,151(5).
MLA Yang, Yuan-Gui,et al."NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS".ASTRONOMICAL JOURNAL 151.5(2016).
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