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 |
DOI | 10.3847/004-6256/151/5/124 |
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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