YZ Phoenicis: a very short period K-type contact binary with variation of the O'Connell effect and orbital period change | |
Sarotsakulchai, Thawicharat1,2,3; Qian SB(钱声帮)1,2,4,5; Soonthornthum, Boonrucksar3; Zhou X(周肖)1,4,5; Zhang J(张嘉)1,4,5; Li LJ(李临甲)1,4,5; Reichart, Daniel E.6; Haislip, Joshua B.6; Kouprianov, Vladimir V.6; Poshyachinda, Saran3 | |
发表期刊 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
2019-08-01 | |
卷号 | 71期号:4页码:18 |
DOI | 10.1093/pasj/psz062 |
产权排序 | 第1完成单位 |
收录类别 | SCI ; EI |
关键词 | binaries: close binaries: eclipsing stars: evolution stars: starspots stars: individual (YZ Phoenicis) |
摘要 | YZPhe is a very short-period contact binary (Sp. = K2V) with an orbital period of 0.2347d near the short period limit (0.22d). We present the complete light curves which photometric data were obtained from the 60 cm telescope of PROMPT-8 at CTIO in Chile during 2016 June to October and 2017 August. The photometric solutions were determined by using the Wilson & Devinney code and the results reveal that YZPhe is a W-subtype shallow contact binary (, q = 2.635, or 1/q = 0.379 for W subtype) with rotational motion of a large hot spot on the more massive component, showing a strong O'Connell effect with variation of maxima in photometric time series at period of 4.20yr and stellar cycle at period of 1.28yr. By compiling all available eclipse times, the result shows a long-term period decrease at a rate of dP/dt = -2.64(+/- 0.02) x 10(-8)dyr(-1), superimposed on a cyclic variation (A(3) = 0.0081d and P-3 = 40.76yr). This variation cannot be explained by the Applegate mechanism. Thus, the cyclic change may be interpreted as the light-travel time effect via the presence of a cool third body. Based on photometric solutions, the third light was detected as of the total light in V and I bands. These results support the existence of a third body. The long-term period decrease can be explained by mass transfer from the more massive component () to the less massive one () or plus angular momentum loss (AML) via magnetic braking. With 1/q < 0.4 and long-term period decrease, all factors suggest that YZPhe is on the AML-controlled state and its fill-out factor will increase, as well as the system evolving into a deeper normal contact binary. |
资助项目 | Chinese Natural Science Foundation[11703080] ; Chinese Natural Science Foundation[11703082] ; Yunnan Natural Science Foundation[2018FB006] ; [CZ. 1.05/3.2.00/08.0144] |
项目资助者 | Chinese Natural Science Foundation[11703080, 11703082] ; Yunnan Natural Science Foundation[2018FB006] ; [CZ. 1.05/3.2.00/08.0144] |
语种 | 英语 |
学科领域 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
文章类型 | Article |
出版者 | OXFORD UNIV PRESS |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
ISSN | 0004-6264 |
URL | 查看原文 |
WOS记录号 | WOS:000482425000015 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | SKY AUTOMATED SURVEY ; ECLIPSING BINARIES ; ADDITIONAL COMPONENTS ; EVOLUTIONARY STATUS ; VARIABLE-STARS ; CLOSE BINARIES ; LIGHT ; LIMIT ; MODULATION ; MECHANISM |
EI入藏号 | 20215211380454 |
EI主题词 | Photometry |
EI分类号 | 431 Air Transportation - 432 Highway Transportation - 433 Railroad Transportation - 434 Waterway Transportation - 641.3 Mass Transfer - 657.2 Extraterrestrial Physics and Stellar Phenomena - 941.4 Optical Variables Measurements |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/21162 |
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 | Sarotsakulchai, Thawicharat |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, China 2.University of Chinese Academy of Sciences, 19 A Yuquan Rd., Shijingshan, 100049 Beijing, China 3.National Astronomical Research Institute of Thailand, Donkaew, Maerim, Chiang Mai 50180, Thailand 4.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, China 5.Center forAstronomical Mega-Science, ChineseAcademyof Sciences, 20A Datun Rd., ChaoyangDistrict, 100012 Beijing, China 6.Department of Physics and Astronomy, University of North Carolina, CB #3255, Chapel Hill, NC 27599, USA |
第一作者单位 | 中国科学院云南天文台 |
通讯作者单位 | 中国科学院云南天文台 |
推荐引用方式 GB/T 7714 | Sarotsakulchai, Thawicharat,Qian SB,Soonthornthum, Boonrucksar,et al. YZ Phoenicis: a very short period K-type contact binary with variation of the O'Connell effect and orbital period change[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2019,71(4):18. |
APA | Sarotsakulchai, Thawicharat.,Qian SB.,Soonthornthum, Boonrucksar.,Zhou X.,Zhang J.,...&Poshyachinda, Saran.(2019).YZ Phoenicis: a very short period K-type contact binary with variation of the O'Connell effect and orbital period change.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,71(4),18. |
MLA | Sarotsakulchai, Thawicharat,et al."YZ Phoenicis: a very short period K-type contact binary with variation of the O'Connell effect and orbital period change".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 71.4(2019):18. |
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