An Orbital Period Investigation of the Semi-Detached Near-Contact Binary DD Monocerotis

doi:10.1093/pasj/61.2.333

YNAO OpenIR > 双星与变星研究组

	An Orbital Period Investigation of the Semi-Detached Near-Contact Binary DD Monocerotis
	Qian SB(钱声帮)1,2 ; Zhu LY(朱俐颖)1,2 ; Boonrucksar, S 3; Xiang, FY 4; He JJ(何家佳)1,2 ; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2009
卷号	61 期号:2 页码:333-337
DOI	10.1093/pasj/61.2.333
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	Stars: Binaries: Close Stars: Binaries : Eclipsing Stars: Individual (Dd Monocerotis) Stars: Stellar Evolution
摘要	The variations of the orbital period of the near-contact binary system DD Monocerotis were analyzed based on three new CCD times of light minimum together with others compiled from the literature. The general trend of the (O - C)(1) Curve indicates a continuous period increase at a rate of dP/dt = + 1.40 x 10(-7) d yr(-1). Meanwhile, by using all available photoelectric and CCD data, a small-amplitude period oscillation (A = 0.0039 d; T = 18.8 yr) was found to be Superimposed on the period increase. The continuous period increase is explained by mass transfer from the less-massive component to the more-massive one (dM(2)/dt = +6.99 x 10(-8) M(circle dot) yr(-1)) which is consistent with the semi-detached configuration of the binary with a lobe-filling secondary discovered by Qian et al. (1997, A&AS, 125, 475). We showed that the timescale of the period change is close to the thermal time scale of the secondary, suggesting that DD Monocerotis is undergoing a case A mass transfer. The small-amplitude period oscillation reveals the presence of an extremely cool stellar companion (M(3)sin i' = 0.13 M(circle dot)) in the system. Accumulation of photoelectric and CCD data will discover small-amplitude cyclic changes in many close binary stars in the future.
项目资助者	National Key Fundamental Research Project [2007CB815406] ; Special Foundation of President and West Light Foundation of the Chinese Academy of Sciences ; Yunnan Natural Science Foundation [2008CD157] ; Chinese Nature Science Foundation [10778718, 10778708] ; Scientific Foundation Fund of Hunan Provincial Education Department [08A072]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6264
URL	查看原文
归档日期	2009-05-21
WOS记录号	WOS:000266228300018
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	CLOSE BINARIES ; SYSTEMS ; MODULATION ; STARS
EI入藏号	20215111361328
EI主题词	Stars
EI分类号	641.3 Mass Transfer - 657.2 Extraterrestrial Physics and Stellar Phenomena - 701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5830
专题	双星与变星研究组
通讯作者	Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, P. R. China 3.National Astronomical Research Institute, Chiang Mai 50200, Thailand 4.Physics Department, Xiangtan University, 411105 Xiangtan, Funan Province, P.R. China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Qian SB,Zhu LY,Boonrucksar, S,et al. An Orbital Period Investigation of the Semi-Detached Near-Contact Binary DD Monocerotis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2009,61(2):333-337.
APA	Qian SB,Zhu LY,Boonrucksar, S,Xiang, FY,He JJ,&Qian, SB .(2009).An Orbital Period Investigation of the Semi-Detached Near-Contact Binary DD Monocerotis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,61(2),333-337.
MLA	Qian SB,et al."An Orbital Period Investigation of the Semi-Detached Near-Contact Binary DD Monocerotis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 61.2(2009):333-337.

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