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YY Geminorum: A very late type close binary with possible magnetic stellar wind
Qian SB(钱声帮)1,2; Liu, DL3; Tan, WL4; Soonthornthum, B5; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2002-08
卷号124期号:2页码:1060-1063
DOI10.1086/339832
产权排序第1完成单位
收录类别SCI
关键词Binaries : Close Stars : Individual (Yy Geminorum) Stars : Mass Loss
摘要The O-C curve of the very late type close binary (dMle+dMle)YY Geminorum is formed and analyzed based on all available times of minimum light. It is found that the orbital period shows a secular decrease with rate dP/dt = -1.08x10(-8) days yr(-1). There is weak evidence indicating that a small-amplitude period oscillation is superposed on the period decrease. YY Gem is a well-detached eclipsing binary containing two very active components. The secular period decrease may suggest that the system is undergoing secular mass and angular momentum loss via a magnetic stellar wind. If the small-amplitude oscillation is real, it can be explained either by magnetic activity cycles or by the presence of a giant planet or brown dwarf.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2002-09-18
WOS记录号WOS:000176888900033
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ORBITAL PERIOD MODULATION ; STARS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5756
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences
3.Nayong County Second Middle School, 553300 Nayong, Guizhou, China
4.Department of Physics, Guizhou Normal University, 550001 Guiyang, Guizhou, China
5.Department of Physics, Chiang Mai University, 50200 Chiang Mai, Thailand
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Qian SB,Liu, DL,Tan, WL,et al. YY Geminorum: A very late type close binary with possible magnetic stellar wind[J]. ASTRONOMICAL JOURNAL,2002,124(2):1060-1063.
APA Qian SB,Liu, DL,Tan, WL,Soonthornthum, B,&Qian, SB .(2002).YY Geminorum: A very late type close binary with possible magnetic stellar wind.ASTRONOMICAL JOURNAL,124(2),1060-1063.
MLA Qian SB,et al."YY Geminorum: A very late type close binary with possible magnetic stellar wind".ASTRONOMICAL JOURNAL 124.2(2002):1060-1063.
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