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A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901
Yang, Tao-Zhi1,2; Esamdin, Ali1,2
2019-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume879Issue:1Pages:59
Contribution Rank1
AbstractIn 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.
Keywordstars: oscillations stars: variables: delta Scuti
DOI10.3847/1538-4357/ab23f3
Indexed BySCI
Language英语
WOS KeywordRR LYRAE STARS ; PULSATING STARS ; KEPLER ; FREQUENCY ; ASTEROSEISMOLOGY
Funding ProjectNational Natural Science Foundation of China[11873081]
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000474384700004
PublisherIOP PUBLISHING LTD
Funding OrganizationNational Natural Science Foundation of China
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/2900
Collection光学天文与技术应用研究室
Corresponding AuthorEsamdin, Ali
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
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GB/T 7714
Yang, Tao-Zhi,Esamdin, Ali. A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901[J]. ASTROPHYSICAL JOURNAL,2019,879(1):59.
APA Yang, Tao-Zhi,&Esamdin, Ali.(2019).A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901.ASTROPHYSICAL JOURNAL,879(1),59.
MLA Yang, Tao-Zhi,et al."A Double-modulation Effect Detected in a Double-mode High-amplitude delta Scuti Star: KIC 10284901".ASTROPHYSICAL JOURNAL 879.1(2019):59.
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