PHOTOMETRIC STUDIES OF THREE NEGLECTED SHORT-PERIOD CONTACT BINARIES GN BOOTIS, BL LEONIS, AND V1918 CYGNI
文献类型：期刊论文
| 作者 | Yang, YG1,2 ; Qian SB(钱声帮)2,3; Dai, HF1
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2013-03 |
| 卷号 | 145期号:3 |
| 关键词 | binaries: close binaries: eclipsing stars: individual (GN Boo, BL Leo, V1918 Cyg) |
| ISSN号 | 0004-6256 |
| 产权排序 | 第三完成单位 |
| 通讯作者 | Yang, YG (reprint author), Huaibei Normal Univ, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China. |
| 英文摘要 | We present new photometry for three short-period contact binaries, GN Boo, BL Leo, and V1918 Cyg, observed from 2008 December to 2012 April using several small telescopes in China. Photometric models were deduced from new observations using the updated Wilson-Devinney Code. The results show that GN Boo and BL Leo are W-type contact binaries, while V1918 Cyg is an A-type one. The mass ratios and fill-out factors are q = 0.320(+/- 0.002) and f = 5.8(+/- 0.1)% for GN Boo, q = 0.476(+/- 0.005) and f = 21.3(+/- 1.1)% for BL Leo, q = 0.264(+/- 0.002), and f = 49.7(+/- 0.7)% for V1918 Cyg, respectively. From the (O - C) curves, it is discovered that the orbital periods of three binaries have varied in a complicated way, i.e., cyclic oscillation for GN Boo, long-term period decrease for BL Leo, and both for V1918 Cyg. The cyclic variations for GN Boo and V1918 Cyg may probably be attributed to the magnetic activity of the primary component or light-time effect due to the third body. Meanwhile, the secular period decreases for BL Leo and V1918 Cyg may result from mass transfer from the primary to the secondary, accompanying the mass and angular momentum loss from the central system. Finally, GN Boo, BL Leo, and V1918 Cyg will evolve into deep contact binaries. Additionally, a statistical study of 37 contact binaries with decreasing periods is given. We obtained the relations of q - f and q - d ln P/dt, and preliminarily determined the mass loss rate of d ln M/dt from the binary system. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | 4-COLOR LIGHT CURVES ; RW-COMAE BERENICES ; ORBITAL-PERIOD ; OVERCONTACT BINARY ; PHYSICAL PARAMETERS ; CLOSE BINARIES ; URSAE MAJORIS ; EVOLUTIONARY STATUS ; SYSTEM ; STARS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/145/3/60/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000314944100008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5890]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.School of Physics and Electronic Information, Huaibei Normal University, 235000 Huaibei, Anhui Province, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China 3.Yunnan Astronomical Observatory/National Astronomical Observatories, Chinese Academy of Sciences, 650011 Kunming, China |
| 推荐引用方式 GB/T 7714 | Yang, YG,Qian SB,Dai, HF. PHOTOMETRIC STUDIES OF THREE NEGLECTED SHORT-PERIOD CONTACT BINARIES GN BOOTIS, BL LEONIS, AND V1918 CYGNI[J]. ASTRONOMICAL JOURNAL,2013,145(3). |
| APA | Yang, YG,Qian SB,&Dai, HF.(2013).PHOTOMETRIC STUDIES OF THREE NEGLECTED SHORT-PERIOD CONTACT BINARIES GN BOOTIS, BL LEONIS, AND V1918 CYGNI.ASTRONOMICAL JOURNAL,145(3). |
| MLA | Yang, YG,et al."PHOTOMETRIC STUDIES OF THREE NEGLECTED SHORT-PERIOD CONTACT BINARIES GN BOOTIS, BL LEONIS, AND V1918 CYGNI".ASTRONOMICAL JOURNAL 145.3(2013). |
入库方式： OAI收割
来源：云南天文台
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