MULTI-PERIOD G-MODE PULSATIONS OF A PRE-HE-WD STAR IN THE ECLIPSING BINARY KIC 9164561

doi:10.3847/2041-8205/821/2/L32

YNAO OpenIR > 恒星物理研究组

	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
发表期刊	ASTROPHYSICAL JOURNAL LETTERS
	2016-04-20
卷号	821 期号:2
DOI	10.3847/2041-8205/821/2/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.
资助项目	National Natural Science Foundation of China (NSFC) ; NSFC/CAS Joint Fund of Astronomy[11373037] ; NSFC/CAS Joint Fund of Astronomy[U1231202] ; NSFC/CAS Joint Fund of Astronomy[U1331121] ; National Basic Research Program of China (973 program)[2014CB845700] ; National Basic Research Program of China (973 program)[2013BC8834900]
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	天文学 ; 恒星与银河系
文章类型	Article
出版者	IOP PUBLISHING LTD
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	2041-8205
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
引用统计	被引频次：20[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, X. B.
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
推荐引用方式 GB/T 7714	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..(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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