Absolute parameters and physical nature of two W-UMa type binaries: V1123 Tau and V1128 Tau
文献类型：期刊论文
| 作者 | Zhang, Xiao-Bin1 ; Ren, An-Bin1,2; Luo, Chang-Qing3; Luo, Yang-Ping3
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2011-05-01 |
| 卷号 | 11期号:5页码:583-593 |
| 关键词 | binaries: eclipsing stars: late-type stars: activity stars: individual (V1123 Tau, V1128 Tau) |
| 英文摘要 | 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000290844200008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7989]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.China W Normal Univ, Inst Theoret Phys, Nanchong 637002, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiao-Bin,Ren, An-Bin,Luo, Chang-Qing,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, Xiao-Bin,Ren, An-Bin,Luo, Chang-Qing,&Luo, Yang-Ping.(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, Xiao-Bin,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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来源：国家天文台
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