A precontact binary and a shallow contact binary are in the same field
文献类型：期刊论文
| 作者 | Liu L(刘亮)1,2,3 ; Qian SB(钱声帮)1,2,3; He JJ(何家佳)1,2; Liao WP(廖文萍)1,2; Liu NP(刘念平)1,2
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2016-06-01 |
| 卷号 | 68期号:3 |
| ISSN号 | 0004-6264 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individuals (V1107 Cassiopeiae, AX Cassiopeiae) |
| 通讯作者 | Liu, L |
| 产权排序 | 第1完成单位 |
| 英文摘要 | The period changes of two close binaries, V1107 Cas and AXCas, which are in the same field, were investigated. Their periods both show a long-term decrease. After further analysis, we found that the periods have their respective cyclic oscillations (T-3 = 6.74 +/- 0.24 yr for V1107 Cas and T-3 = 13.8 +/- 0.3 yr for AXCas), which are possibly caused by a third body due to the light-time effect. We also obtained the complete VRcIc light curves for V1107 Cas and analyzed them with the 2010 version of the Wilson-Devinney code. The photometric results reveal that V1107 Cas is a W-type shallow contact (15.2% +/- 1.8%) binary, with a mass-ratio of 1.797 +/- 0.006. The period variation and photometric solution suggest that V1107 Cas is a newly formed contact binary system. Moreover, we estimated the fundamental parameters for V1107 Cas. They are: M-1 = 0.39 +/- 0.01M(circle dot), M-2 = 0.70 +/- 0.03 M-circle dot, R-1 = 0.52 +/- 0.10 R-circle dot, R-2 = 0.68 +/- 0.12 R-circle dot, L-1 = 0.178 +/- 0.108 L-circle dot, and L-2 = 0.196 +/- 0.116 L-circle dot. Then, based on the coplane assumption, we deduced the masses of possible third bodies to be M-3 = 0.091 +/- 0.019 M-circle dot for V1107 Cas and M-3 = 0.325 +/- 0.029 M-circle dot for AXCas. Finally, we inferred the evolutional stage of AXCas, and believe that it is a precontact binary. Thus, the precontact binary AXCas and the shallow contact binary V1107 Cas have adjoining evolutional stages. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | W UMA BINARY ; VELOCITY CURVES ; CLOSE BINARIES ; STAR LIGHT ; PERIOD ; TAURI ; CYGNI |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/68/3/31 |
| 语种 | 英语 |
| WOS记录号 | WOS:000377426100006 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9605]  |
| 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.Yunnan Observatories, Chinese Academy of Sciences (CAS), PO Box 110, 650011 Kunming, P.R. China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, P.R. China 3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P.R. China |
| 推荐引用方式 GB/T 7714 | Liu L,Qian SB,He JJ,et al. A precontact binary and a shallow contact binary are in the same field[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2016,68(3). |
| APA | Liu L,Qian SB,He JJ,Liao WP,&Liu NP.(2016).A precontact binary and a shallow contact binary are in the same field.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,68(3). |
| MLA | Liu L,et al."A precontact binary and a shallow contact binary are in the same field".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 68.3(2016). |
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来源：云南天文台
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