Institutional Repository of Optical Astronomy Research Laboratory
| KIC 5768203: A delta Sct Pulsator Modulated by Rotation and Spots | |
Ma, Shuguo1,2 ; Ali, Esamdin1,2; Lv, Chenglong1,2; Wei, Peng1; Yang, TaoZhi3; Niu, Hubiao1; Nie, Jundan4; Liu, Junhui5; Zong, Peng6; Feng, Guojie1; Zhang, Mengfan1
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| 2022-07-01 | |
| Source Publication | ASTRONOMICAL JOURNAL
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| ISSN | 0004-6256 |
| Volume | 164Issue:1Pages:22 |
| Contribution Rank | 1 |
| Abstract | We perform a detailed analysis of the Kepler target KIC 5768203 based on the Kepler and Transiting Exoplanet Survey Satellite (TESS) data. Three independent frequencies are detected by Fourier analysis of the Kepler long-cadence data: two pulsation frequencies f ( P0) = 7.807874(2) day(-1) and f ( P1) = 9.970035(6) day(-1), which have amplitudes below 1.4 mmag in the Kepler band, and one modulation frequency f (rot) = 0.45813(1) day(-1). Based on a period ratio of 0.7803, f ( P0) and f ( P1) are supposed to be radial frequencies. However, further confirmation is needed. Based on the triplets and phase variations of the two pulsation frequencies, the star is possibly a delta Sct pulsator in a binary system. The modulation frequency f (rot) and its four harmonics could be attributed to the stellar rotation and surface spots. With the rotation frequency f (rot), the rotation velocity of the star is estimated to be 75(3) km s(-1). By analyzing the phase diagram without pulsations, it is inferred that there are starspots (or clusters of starspots) of large area on the surface of KIC 5768203. These starspots are slowly evolving in position and brightness over the course of the Kepler long-cadence observations. The finding of the rotation frequency in the TESS data implies the long-term presence of starspots on the surface of KIC 5768203. |
| DOI | 10.3847/1538-3881/ac6fde |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | TURBULENT CONVECTION ; KEPLER OBSERVATIONS ; P-MODE ; SCUTI ; STARS ; ASTEROSEISMOLOGY ; OSCILLATIONS ; FREQUENCIES ; STABILITY ; DISCOVERY |
| Funding Project | National Natural Science Foundation of China[12003060] ; National Natural Science Foundation of China[U2031209] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2020D01B59] ; Chinese Academy of Sciences (CAS) Light of West China Program[2021-XBQNXZ-029] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000817740500001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | National Natural Science Foundation of China ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS) Light of West China Program |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4824 |
| Collection | 光学天文与技术应用研究室 |
| Corresponding Author | Ma, Shuguo |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Xi An Jiao Tong Univ, Sch Phys, Xian 710049, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Opt Astron, Beijing 100101, Peoples R China 5.Xiamen Univ, Astron Dept, Xiamen 361005, Peoples R China 6.Beijing Normal Univ, Astron Dept, Beijing 100875, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Ma, Shuguo,Ali, Esamdin,Lv, Chenglong,et al. KIC 5768203: A delta Sct Pulsator Modulated by Rotation and Spots[J]. ASTRONOMICAL JOURNAL,2022,164(1):22. |
| APA | Ma, Shuguo.,Ali, Esamdin.,Lv, Chenglong.,Wei, Peng.,Yang, TaoZhi.,...&Zhang, Mengfan.(2022).KIC 5768203: A delta Sct Pulsator Modulated by Rotation and Spots.ASTRONOMICAL JOURNAL,164(1),22. |
| MLA | Ma, Shuguo,et al."KIC 5768203: A delta Sct Pulsator Modulated by Rotation and Spots".ASTRONOMICAL JOURNAL 164.1(2022):22. |
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| Ma-2022-KIC 3440495_（4563KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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