A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901

doi:10.3847/1538-4357/ab23f3

	A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901
	Esamdin, Ali1,2 ; Yang, Tao-Zhi1,2
刊名	ASTROPHYSICAL JOURNAL
	2019-07-01
卷号	879 期号:1 页码:9
关键词	stars: oscillations stars: variables: delta Scuti
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab23f3
通讯作者	Esamdin, Ali(aliyi@xao.ac.cn)
英文摘要	In this paper, we present an analysis of the pulsating behavior of Kepler target KIC 10284901. The Fourier transform of the high-precision light curve reveals seven independent frequencies for its light variations. Among them, the first two frequencies are main pulsation modes: F0 = 18.994054(1) day(-1) and Fl = 24.335804(4) day(-1); the ratio F0/F1 = 0.7805 classifies this star as a double-mode high-amplitude delta Scuti (HADS) star; another two frequencies, f(m1) = 0.4407 day(-1) and f(m2) = 0.8125 day(-1), are detected directly, and the modulations of f(m1) and f(m2 )to F0 and Fl modes (seen as quintuplet structures centered on these two modes in the frequency spectrum) are also found. This is the first detection of a double-modulation effect in the HADS stars. The features of the frequency pattern and the ratio (f(m1)/f(m2) approximate to 1:2), as well as the cyclic variation of amplitude of the two dominant pulsation modes, which seem to be similar to that in Blazhko RR Lyrae stars, indicate this modulation might be related to the Blazhko effect. A preliminary analysis suggests that KIC 10284901 is in the bottom of the HADS instability strip and situated in the main sequence.
资助项目	National Natural Science Foundation of China[11873081]
WOS关键词	RR LYRAE STARS ; PULSATING STARS ; KEPLER ; FREQUENCY ; ASTEROSEISMOLOGY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000474384700004
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/2899]
专题	新疆天文台_光学天文与技术应用研究室
通讯作者	Esamdin, Ali
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式 GB/T 7714	Esamdin, Ali,Yang, Tao-Zhi. A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901[J]. ASTROPHYSICAL JOURNAL,2019,879(1):9.
APA	Esamdin, Ali,&Yang, Tao-Zhi.(2019).A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901.ASTROPHYSICAL JOURNAL,879(1),9.
MLA	Esamdin, Ali,et al."A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901".ASTROPHYSICAL JOURNAL 879.1(2019):9.