Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau

doi:10.1088/1674-4527/11/5/008

YNAO OpenIR > 恒星物理研究组

	Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau
	Zhang, XB 1; Ren, AB 1,2; Luo CQ(罗常青)3 ; Luo YP(罗杨平)3 ; Zhang, XB (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2011-05
卷号	11 期号:5 页码:583-593
DOI	10.1088/1674-4527/11/5/008
产权排序	第3完成单位
收录类别	SCI
关键词	Binaries: Eclipsing Stars: Late-type Stars: Activity Stars: Individual (V1123 Tau V1128 Tau)
摘要	We present high-precision, multi-band CCD photometry of two less-studied close binaries V1123 Tau and V1128 Tau. Complete covered light curves and a number of new times of light minima of the two eclipsing systems were obtained, based on which, revised orbital elements and new ephemerides were given. By adopting the Wilson-Devinney method, the light curves were analyzed. The photometric solutions confirm the W UMa-type nature of the binary systems. With the less-massive secondary slightly cooler than the primary, V1123 Tau could be classified as an A-type contact system. While V1128 Tau is typically considered a W-type W UMa star, the surface temperature of its secondary component is determined to be absolutely higher than the primary by about 270 K. Combining with the results of radial-velocity solutions, we determined absolute parameters of the two systems. The mass, radius and luminosity for each component of V1123 Tau were derived as: 1.36 +/- 0.05M(circle dot), 1.37 +/- 0.02R(circle dot), and 2.01 +/- 0.07L(circle dot) and 0.40 +/- 0.02M(circle dot), 0.80 +/- 0.01R(circle dot), and 0.67 +/- 0.04L(circle dot), respectively. For V1128 Tau, the absolute parameters were computed to be 1.09 +/- 0.03M(circle dot), 1.01 +/- 0.01R(circle dot), and 1.34 +/- 0.06L(circle dot) and 0.58 +/- 0.01M(circle dot), 0.76 +/- 0.01R(circle dot), and 0.91 +/- 0.05L(circle dot), respectively. Based on these results, the evolutionary status and the physical nature of the two binary systems are discussed, while also connecting with the theoretical models.
项目资助者	National Natural Science Foundation of China [10773015]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1674-4527
URL	查看原文
WOS记录号	WOS:000290844200008
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	LIGHT CURVES ; STAR LIGHT ; PHOTOMETRY ; VELOCITY ; SYSTEMS
引用统计	被引频次：12[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/114a53/5208
专题	恒星物理研究组
通讯作者	Zhang, XB (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
作者单位	1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.Institute of Theoretical Physics, China West Normal University, Nanchong 637002, China 3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Zhang, XB,Ren, AB,Luo CQ,et al. Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2011,11(5):583-593.
APA	Zhang, XB,Ren, AB,Luo CQ,Luo YP,&Zhang, XB .(2011).Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,11(5),583-593.
MLA	Zhang, XB,et al."Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 11.5(2011):583-593.

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