FRAGILE BINARY CANDIDATES IN THE SDSS DR8 SPECTROSCOPIC ARCHIVE
文献类型：期刊论文
| 作者 | Zhao, J. K.1,2; Oswalt, T. D.1; Zhao, G.2
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2012-02-01 |
| 卷号 | 143期号:2 |
| 关键词 | stars: activity stars: chromospheres |
| 英文摘要 | We present a catalog of 80 very wide fragile binary candidates (projected separations > 10,000 AU) from the Sloan Digital Sky Survey Data Release Eight spectral archive. The pairs were selected based on proper motion, radial velocity, metallicity, and photometric parallax criteria. The angular separations of these pairs range from 3 '' to 250 ''. The peak in the metallicity distribution of these pairs is about -0.5 dex of solar metallicity. Space motions and reduced proper motion diagrams indicate that all these pairs are members of the disk. The chromospheric activity index S-HK of each component in 38 binary candidates having spectra of high signal-to-noise ratio and member stars of three open clusters (NGC 2420, M67, and NGC 6791) were measured. The S-HK versus color relation for these binary candidates is consistent with the trend seen in these open clusters. The ages implied by this relation suggest that fragile wide pairs can survive longer than 8 Gyr. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000299803600006 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6334]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Florida Inst Technol, Melbourne, FL 32901 USA 2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, J. K.,Oswalt, T. D.,Zhao, G.. FRAGILE BINARY CANDIDATES IN THE SDSS DR8 SPECTROSCOPIC ARCHIVE[J]. ASTRONOMICAL JOURNAL,2012,143(2). |
| APA | Zhao, J. K.,Oswalt, T. D.,&Zhao, G..(2012).FRAGILE BINARY CANDIDATES IN THE SDSS DR8 SPECTROSCOPIC ARCHIVE.ASTRONOMICAL JOURNAL,143(2). |
| MLA | Zhao, J. K.,et al."FRAGILE BINARY CANDIDATES IN THE SDSS DR8 SPECTROSCOPIC ARCHIVE".ASTRONOMICAL JOURNAL 143.2(2012). |
入库方式： OAI收割
来源：国家天文台
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