KIC 8262223: A Post-mass Transfer Eclipsing Binary Consisting of a Delta Scuti Pulsator and a Helium White Dwarf Precursor
文献类型：期刊论文
| 作者 | Guo, Zhao1; Gies, Douglas R.1; Matson, Rachel A.1; Hernandez, Antonio Garcia2; Han ZW(韩占文)3 ; Chen XF(陈雪飞)3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017-03-10 |
| 卷号 | 837期号:2 |
| 关键词 | binaries: eclipsing stars: evolution stars: oscillations (including pulsations) stars: variables: delta Scuti white dwarfs |
| ISSN号 | 0004-637X |
| 产权排序 | 第3完成单位 |
| 通讯作者 | Guo, Zhao(Georgia State Univ, Dept Phys & Astron, POB 5060, Atlanta, GA 30302 USA) |
| 英文摘要 | KIC 8262223 is an eclipsing binary with a short orbital period (P = 1.61 day). The Kepler light curves are of Algol-type and display deep and partial eclipses, ellipsoidal variations, and pulsations of delta Scuti type. We analyzed the Kepler photometric data, complemented by phase-resolved spectra from the R-C Spectrograph on the 4 meter Mayall telescope. at the. Kitt Peak National Observatory and determined the fundamental parameters of this system. The low-mass and oversized secondary (M-2 = 0.20M(circle dot), R-2 = 1.31R(circle dot)) is the remnant of the donor star that transferred most of its mass to the gainer, and now the primary star. The current primary star is thus not a normal delta Scuti star but the result of mass accretion from a lower mass progenitor. We discuss the possible evolutionary history and demonstrate with the MESA evolution code that this system and several other systems discussed in prior literature can be understood as the result of non-conservative binary evolution for the formation of EL CVn-type binaries. The pulsations of the primary star can be explained as radial and non-radial pressure modes. The equilibrium models from single star evolutionary tracks can match the observed mass and radius (M-1 = 1.94M(circle dot), R-1 = 1.67R(circle dot)) but the predicted unstable modes associated with these models differ somewhat from those observed. We discuss the need for better theoretical understanding of such post-mass transfer delta Scuti pulsators. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 天文学 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR ASTROPHYSICS MESA ; INSTABILITY STRIP ; CLOSE BINARIES ; COMPONENT SPECTRA ; UNEXPECTED SERIES ; LIGHT CURVES ; SHORT-PERIOD ; DATA RELEASE ; STARS ; CATALOG |
| 收录类别 | SCI |
| 原文出处 | http://stacks.iop.org/0004-637X/837/i=2/a=114?key=crossref.114ab237f664c07abc2a4b5c60d45abd |
| 语种 | 英语 |
| WOS记录号 | WOS:000397497300001 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9990]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Center for High Angular Resolution Astronomy and Department of Physics and Astronomy,Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA 2.Instituto de Astrofísica e Ciências do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, PT4150-762 Porto, Portugal 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, the Chinese Academy of Sciences, Kunming, 650011, China |
| 推荐引用方式 GB/T 7714 | Guo, Zhao,Gies, Douglas R.,Matson, Rachel A.,et al. KIC 8262223: A Post-mass Transfer Eclipsing Binary Consisting of a Delta Scuti Pulsator and a Helium White Dwarf Precursor[J]. ASTROPHYSICAL JOURNAL,2017,837(2). |
| APA | Guo, Zhao,Gies, Douglas R.,Matson, Rachel A.,Hernandez, Antonio Garcia,Han ZW,&Chen XF.(2017).KIC 8262223: A Post-mass Transfer Eclipsing Binary Consisting of a Delta Scuti Pulsator and a Helium White Dwarf Precursor.ASTROPHYSICAL JOURNAL,837(2). |
| MLA | Guo, Zhao,et al."KIC 8262223: A Post-mass Transfer Eclipsing Binary Consisting of a Delta Scuti Pulsator and a Helium White Dwarf Precursor".ASTROPHYSICAL JOURNAL 837.2(2017). |
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来源：云南天文台
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