KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System
文献类型：期刊论文
| 作者 | Ma,Shuguo1,8 ; Esamdin,Ali1,8; Hernández,Antonio García6; Murphy,Simon J.5; Lv,Chenglong1,8; Wei,Peng8; Rieutord,Michel4; Pascual-Granado,Javier3; Dang,Fei8; Niu,Hubiao8
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2022-09-30 |
| 卷号 | 937期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac8c30 |
| 通讯作者 | Esamdin,Ali() |
| 英文摘要 | Abstract In this paper, we study the pulsation properties of KIC 3440495 using Kepler and TESS data. A Fourier analysis of the light curve reveals 24 pulsation modes as well as 29 frequencies associated with rotation. The rotation frequency is derived to be f rot = 2.322909(2) day?1, and the rotational modulation is determined to be caused by starspots. A large frequency separation of Δν = 54.5 μHz is found by using a Fourier transform, the autocorrelation function, a histogram of frequency differences, and an échelle diagram. We use the large separation to estimate the refined stellar parameters of the star to be v = [239, 279] km s?1, M = [1.5, 1.65] M ⊙, R equator = [2.03, 2.30] R ⊙, R polar = [1.72, 1.78] R ⊙, and ω = [0.61, 0.77]. The phase modulations of the pulsating frequencies show a long-term trend which may be attributed to an orbital effect of a binary system; hence, the star may be a fast rotating pulsator in a binary system. KIC 3440495 has an amplitude spectrum similar to Altair, and is identified as a potential sister of Altair. Based on studies of Altair, KIC 3330495 is presumably a young star at a similar evolutionary stage. |
| 语种 | 英语 |
| WOS记录号 | IOP:APJ_937_2_80 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6178]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Esamdin,Ali |
| 作者单位 | 1.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 2.School of Physics, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China 3.Instituto de Astrofísica de Andalucía, Glorieta de la Astronomía s/n, E-18008 Granada, Spain 4.IRAP, Université de Toulouse, CNRS, UPS, CNES, 14, Avenue édouard Belin, F-31400 Toulouse, France 5.Centre for Astrophysics, University of Southern Queensland, Toowoomba, QLD 4350, Australia 6.Theoretical Physics and the Cosmos, University of Granada, E-18071, Granada, Spain 7.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, Tashkent 100052, Uzbekistan 8.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People’s Republic of China; mashuguo@xao.ac.cn, aliyi@xao.ac.cn |
| 推荐引用方式 GB/T 7714 | Ma,Shuguo,Esamdin,Ali,Hernández,Antonio García,et al. KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System[J]. The Astrophysical Journal,2022,937(2). |
| APA | Ma,Shuguo.,Esamdin,Ali.,Hernández,Antonio García.,Murphy,Simon J..,Lv,Chenglong.,...&Tillayev,Yusuf.(2022).KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System.The Astrophysical Journal,937(2). |
| MLA | Ma,Shuguo,et al."KIC 3440495: A Rapidly Rotating δ Scuti-γ Doradus Hybrid Pulsator in a Binary System".The Astrophysical Journal 937.2(2022). |
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