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A precontact binary and a shallow contact binary are in the same field
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; Liu, L
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2016-06-01
卷号68期号:3
DOI10.1093/pasj/psw023
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individuals (V1107 Cassiopeiae Ax Cassiopeiae)
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.
项目资助者Chinese Natural Science Foundation(11403095, 11133007, 11325315) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09010202) ; Yunnan Natural Science Foundation(2014FB187) ; Youth Innovation Promotion Association CAS
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2016-12-30
WOS记录号WOS:000377426100006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]W UMA BINARY ; VELOCITY CURVES ; CLOSE BINARIES ; STAR LIGHT ; PERIOD ; TAURI ; CYGNI
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9605
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Liu, L
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
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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,&Liu, L.(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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