NEAR-CONTACT BINARIES IZ MONOCEROTIS AND AR DRACONIS
Yang, Yuan-Gui1,2; Dai, Hai-Feng1,2; Zhou, Zheng1; Li, Qun1
刊名ASTRONOMICAL JOURNAL
2016-05-01
卷号151期号:5
关键词Binaries: Close Binaries: Eclipsing stars: individual (AR Dra, IZ Mon)
ISSN号0004-6256
DOI10.3847/004-6256/151/5/124
文献子类Article
英文摘要

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.

学科主题天文学 ; 恒星与银河系 ; 恒星天文学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目Natural Science Foundation of China[11473009] ; Natural Science Foundation of China[U1131102] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201407]
WOS关键词URSAE MAJORIS SYSTEMS ; ECLIPSING BINARIES ; EVOLUTION ; STARS ; TAURI
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000375610400015
资助机构Natural Science Foundation of China[11473009, U1131102] ; Key Laboratory for the Structure and Evolution of Celestial Objects[OP201407]
内容类型期刊论文
源URL[http://ir.ynao.ac.cn/handle/114a53/9589]  
专题云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Yang, Yuan-Gui
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
推荐引用方式
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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