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.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
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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000374331900013
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5363]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R 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).