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MULTI-PERIOD G-MODE PULSATIONS OF A PRE-HE-WD STAR IN THE ECLIPSING BINARY KIC 9164561
Zhang, X. B.1; Fu, J. N.2; Li Y(李焱)3; Ren, A. B.2; Luo, C. Q.1; Zhang, XB (reprint author), Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2016-04-20
卷号821期号:2
DOI10.3847/2041-8205/821/2/L32
产权排序第3完成单位
收录类别SCI
关键词Binaries: Eclipsing Stars: Individual (Kic 9164561) Stars: Oscillations White Dwarfs
摘要We report the discovery of a new pulsating pre-He-WD in the EL CVn-type binary KIC 9164561. Light curve modeling and frequency analysis of the binary system were carried out based on short-cadence Kepler photometry. Combined with the radial-velocity solution, revised physical parameters of the binary system were determined. The component KIC 9164561B was confirmed to be a pre-He-WD star with M = 0.213 +/- 0.012M(circle dot), R = 0.283 +/- 0.006R(circle dot), and T-eff = 10650 +/- 200 K. In addition to the light changes due to an eclipse, pulsational light variations of the pre-He-WD star were detected. The Fourier analysis reveals at least 52 frequencies, with the dominant one at 313.4 mu Hz. A brief mode identification indicates that the pre-He-WD star pulsates in g-modes with an average period spacing of Delta Pi(l=1) = 80.87 s. Moreover, a number of multiplets due to rotational splitting were identified from the frequency spectra. The rotational period of the pulsating pre-He-WD star was found to equal to the orbital period, indicating that KIC 9164561B is in synchronous rotation.
项目资助者National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy(11373037, U1231202, U1331121) ; National Basic Research Program of China (973 program)(2014CB845700, 2013BC8834900)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN2041-8205
URL查看原文
WOS记录号WOS:000374331900013
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]EXTREMELY LOW-MASS ; WHITE-DWARF STARS ; RED-GIANT STAR ; EVOLUTIONARY SEQUENCES ; LIGHT CURVES ; DISCOVERY ; PULSARS ; PERIOD ; FRAME
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9582
专题恒星物理研究组
通讯作者Zhang, XB (reprint author), Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China.
作者单位1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China
2.Department of Astronomy, Beijing Normal University, Beijing, 100875, China
3.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, China
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Zhang, X. B.,Fu, J. N.,Li Y,et al. MULTI-PERIOD G-MODE PULSATIONS OF A PRE-HE-WD STAR IN THE ECLIPSING BINARY KIC 9164561[J]. ASTROPHYSICAL JOURNAL LETTERS,2016,821(2).
APA Zhang, X. B.,Fu, J. N.,Li Y,Ren, A. B.,Luo, C. Q.,&Zhang, XB .(2016).MULTI-PERIOD G-MODE PULSATIONS OF A PRE-HE-WD STAR IN THE ECLIPSING BINARY KIC 9164561.ASTROPHYSICAL JOURNAL LETTERS,821(2).
MLA Zhang, X. B.,et al."MULTI-PERIOD G-MODE PULSATIONS OF A PRE-HE-WD STAR IN THE ECLIPSING BINARY KIC 9164561".ASTROPHYSICAL JOURNAL LETTERS 821.2(2016).
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