Low-mass Pre-He White Dwarf Stars in Kepler Eclipsing Binaries with Multi-periodic Pulsations
文献类型：期刊论文
| 作者 | Zhang, X. B.1; Fu, J. N.2; Liu, N.2; Luo, C. Q.1; Ren, A. B.2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 850期号:2页码:8 |
| ISSN号 | 0004-637X |
| 关键词 | binaries: eclipsing stars: individual (KIC 10989032, KIC 8087799) stars: oscillations white dwarfs |
| DOI | 10.3847/1538-4357/aa9577 |
| 英文摘要 | We report the discovery of two thermally bloated low-mass pre-He white dwarfs (WDs) in two eclipsing binaries, KIC 10989032 and KIC 8087799. Based on the Kepler long-cadence photometry, we determined comprehensive photometric solutions of the two binary systems. The light curve analysis reveals that KIC 10989032 is a partially eclipsed detached binary system containing a probable low-mass WD with the temperature of about 10,300 K. Having a WD with the temperature of about 13,300, KKIC 8087799 is typical of an EL CVn system. By utilizing radial velocity measurements available for the A-type primary star of KIC 10989032, the mass and radius of the WD component are determined to be 0.24 +/- 0.02 M-circle dot and 0.50 +/- 0.01 R-circle dot, respectively. The values of mass and radius of the WD in KIC 8087799 are estimated as 0.16 +/- 0.02M(circle dot) and 0.21 +/- 0.01 R-circle dot, respectively, according to the effective temperature and mean density of the A-type star derived from the photometric solution. We therefore introduce KIC 10989032 and KIC 8087799 as the eleventh and twelfth dA+ WD eclipsing binaries in the Kepler field. Moreover, both binaries display marked multi-periodic pulsations superimposed on binary effects. A preliminary frequency analysis is applied to the light residuals when subtracting the synthetic eclipsing light curves from the observations, revealing that the light pulsations of the two systems are both due to the delta Sct-type primaries. We hence classify KIC 10989032 and KIC 8087799 as two WD+delta Sct binaries. |
| WOS关键词 | DELTA-SCUTI STARS ; RED-GIANT STAR ; SX PHE STARS ; LIGHT CURVES ; SYSTEM |
| 资助项目 | National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy[11373037] ; NSFC/CAS Joint Fund of Astronomy[U1331121] ; National Natural Science Foundation of China (NSFC)[11673003] ; National Basic Research Program of China (973 Program)[2014CB845700] ; National Basic Research Program of China (973 Program)[2013CB834900] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000425473800001 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy ; National Natural Science Foundation of China (NSFC) ; National Basic Research Program of China (973 Program) |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/35813]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhang, X. B. |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, X. B.,Fu, J. N.,Liu, N.,et al. Low-mass Pre-He White Dwarf Stars in Kepler Eclipsing Binaries with Multi-periodic Pulsations[J]. ASTROPHYSICAL JOURNAL,2017,850(2):8. |
| APA | Zhang, X. B.,Fu, J. N.,Liu, N.,Luo, C. Q.,&Ren, A. B..(2017).Low-mass Pre-He White Dwarf Stars in Kepler Eclipsing Binaries with Multi-periodic Pulsations.ASTROPHYSICAL JOURNAL,850(2),8. |
| MLA | Zhang, X. B.,et al."Low-mass Pre-He White Dwarf Stars in Kepler Eclipsing Binaries with Multi-periodic Pulsations".ASTROPHYSICAL JOURNAL 850.2(2017):8. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。