NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS
Yang, Yuan-Gui1,2; Dai, Hai-Feng1,2; Zhou, Zheng1; Li, Qun1; Yang, YG
发表期刊ASTRONOMICAL JOURNAL
2016-05-01
卷号151期号:5
DOI10.3847/004-6256/151/5/124
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing StArs: Individual (Ar Dra Iz Mon)
摘要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.
项目资助者Natural Science Foundation of China(11473009, U1131102) ; Key Laboratory for the Structure and Evolution of Celestial Objects(OP201407)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
WOS记录号WOS:000375610400015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; ECLIPSING BINARIES ; EVOLUTION ; STARS ; TAURI
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9589
专题中国科学院天体结构与演化重点实验室
通讯作者Yang, YG
作者单位1.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
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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,&Yang, YG.(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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