THE INITIAL-FINAL MASS RELATION AMONG WHITE DWARFS IN WIDE BINARIES
文献类型：期刊论文
| 作者 | Zhao, J. K.1,2; Oswalt, T. D.1; Willson, L. A.3; Wang, Q.3 ; Zhao, G.2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-02-20 |
| 卷号 | 746期号:2 |
| 关键词 | stars: activity white dwarfs |
| 英文摘要 | We present the initial-final mass relation derived from 10 white dwarfs in wide binaries that consist of a main-sequence star and a white dwarf. The temperature and gravity of each white dwarf were measured by fitting theoretical model atmospheres to the observed spectrum using a chi(2) fitting algorithm. The cooling time and mass were obtained using theoretical cooling tracks. The total age of each binary was estimated from the chromospheric activity of its main-sequence component to an uncertainty of about 0.17 dex in log t. The difference between the total age and white dwarf cooling time is taken as the main-sequence lifetime of each white dwarf. The initial mass of each white dwarf was then determined using stellar evolution tracks with a corresponding metallicity derived from spectra of their main-sequence companions, thus yielding the initial-final mass relation. Most of the initial masses of the white dwarf components are between 1 and 2 M-circle dot. Our results suggest a correlation between the metallicity of a white dwarf's progenitor and the amount of post-main-sequence mass loss it experiences-at least among progenitors with masses in the range of 1-2 M-circle dot. A comparison of our observations to theoretical models suggests that low-mass stars preferentially lose mass on the red giant branch. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300406300030 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6166]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL 32901 USA 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.Iowa State Univ, Dept Phys & Astron, Ames, IA 50010 USA |
| 推荐引用方式 GB/T 7714 | Zhao, J. K.,Oswalt, T. D.,Willson, L. A.,et al. THE INITIAL-FINAL MASS RELATION AMONG WHITE DWARFS IN WIDE BINARIES[J]. ASTROPHYSICAL JOURNAL,2012,746(2). |
| APA | Zhao, J. K.,Oswalt, T. D.,Willson, L. A.,Wang, Q.,&Zhao, G..(2012).THE INITIAL-FINAL MASS RELATION AMONG WHITE DWARFS IN WIDE BINARIES.ASTROPHYSICAL JOURNAL,746(2). |
| MLA | Zhao, J. K.,et al."THE INITIAL-FINAL MASS RELATION AMONG WHITE DWARFS IN WIDE BINARIES".ASTROPHYSICAL JOURNAL 746.2(2012). |
入库方式： OAI收割
来源：国家天文台
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