RW Doradus: A solar-type shallow contact binary with a new orbital period investigation
文献类型:期刊论文
作者 | Sarotsakulchai, Thawicharat1,2,3; Qian SB(钱声帮)1,2,4,5; Soonthornthum, Boonrucksar3; Fernandez Lajus, Eduardo6,7; Liu NP(刘念平)1,4,5; Zhou X(周肖)1,4,5; Zhang J(张嘉)1,4,5; Liao WP(廖文萍)1,4,5; Reichart, Daniel E.8; Haislip, Joshua B.8 |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
出版日期 | 2019-04-01 |
卷号 | 71期号:2页码:13 |
ISSN号 | 0004-6264 |
关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual (RW Doradus) |
DOI | 10.1093/pasj/psy149 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | New CCD photometric light curves of the short-period (P = 0.285 d) eclipsing binary RW Dor are presented. The observations were performed with the PROMPT-8 robotic telescope at CTIO in Chile between 2015 March and 2017 March. Other eclipse timings were obtained from the 2.15m JS telescope at CASLEO, San Juan, Argentina in 2011 December. Based on a light curve analysis, it is found that RW Dor is a W-type shallow contact binary with a fill-out factor f similar to 11% and a high mass ratio q similar to 1.587 (1/q = 0.63), where the hotter component is the less massive one (M-1 similar to 0.52 M-circle dot and M-2 similar to 0.82 M-circle dot). For orbital-period investigation, 15 new eclipse times and those previously published were compiled. O - C analysis with very weak evidence suggests that a long-term decrease in period with a rate of dP/dt = -9.61 x 10(-9) d yr(-1) is superimposed on a cyclic variation (A(3) = 0.0054 d and P-3 = 49.9 yr). The long-term decrease can be interpreted as mass transfer from the more massive component to the less massive one, or combined with angular momentum loss via magnetic braking. In addition, the marginal contact phase, high mass ratio (1/q > 0.4), and long-term decrease in period all suggest that RW Dor is a newly formed contact binary via Case A mass transfer, and it will evolve into a deeper normal contact binary. If the cyclic change is correct, the light travel-time effect via the presence of a cool third body will be a more plausible explanation for this. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | ADDITIONAL COMPONENTS ; COMAE BERENICES ; LIGHT CURVES ; SYSTEM ; EVOLUTION ; PARAMETERS ; VELOCITY ; SEARCH ; STARS |
资助项目 | National Natural Science Foundation of China[11503077] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000489563600005 |
资助机构 | National Natural Science Foundation of China[11503077] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21408] |
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 |
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, 19A Yuquan Road, Shijingshan, 100049 Beijing, China 3.National Astronomical Research Institute of Thailand, Ministry of Science and Technology, Bangkok, Thailand 4.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, China 5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China 6.Facultad de Ciencias Astron´omicas y Geof´ısicas – UNLP, 1900 La Plata, Buenos Aires, Argentina 7.Instituto de Astrof´ısica de La Plata – CONICET/UNLP, 1900 La Plata, Buenos Aires, Argentina 8.Department of Physics and Astronomy, University of North Carolina, CB #3255, Chapel Hill, NC 27599, USA |
推荐引用方式 GB/T 7714 | Sarotsakulchai, Thawicharat,Qian SB,Soonthornthum, Boonrucksar,et al. RW Doradus: A solar-type shallow contact binary with a new orbital period investigation[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2019,71(2):13. |
APA | Sarotsakulchai, Thawicharat.,Qian SB.,Soonthornthum, Boonrucksar.,Fernandez Lajus, Eduardo.,Liu NP.,...&Poshyachinda, Saran.(2019).RW Doradus: A solar-type shallow contact binary with a new orbital period investigation.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,71(2),13. |
MLA | Sarotsakulchai, Thawicharat,et al."RW Doradus: A solar-type shallow contact binary with a new orbital period investigation".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 71.2(2019):13. |
入库方式: OAI收割
来源:云南天文台
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。