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

	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
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2016-04-20
卷号	821 期号:2
关键词	binaries: eclipsing stars: individual (KIC 9164561) stars: oscillations white dwarfs
ISSN号	2041-8205
通讯作者	Zhang, XB (reprint author), Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China.
产权排序	第三完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	EXTREMELY LOW-MASS ; WHITE-DWARF STARS ; RED-GIANT STAR ; EVOLUTIONARY SEQUENCES ; LIGHT CURVES ; DISCOVERY ; PULSARS ; PERIOD ; FRAME
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.3847/2041-8205/821/2/L32/meta
语种	英语
WOS记录号	WOS:000374331900013
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9582]
专题	云南天文台_恒星物理研究组
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).