| Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247 | |
Zhang, Jiayi1,2; Fu, Jianning1,2; Cang, Tianqi1,2; Su J(苏杰)3,4,5 ; Chen, Yanhui5,6; Ma, Xiaoyu1,2; Meng, Gang1,2
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2024-11-01 | |
| 卷号 | 976期号:1 |
| DOI | 10.3847/1538-4357/ad8561 |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 摘要 | We present a comprehensive analysis of oscillations of the helium-rich white dwarf DBV star EPIC 248705247 (SDSS J102106.69+082724.8). We extract the light curves from 79.7 days of K2 Campaign 14 data and identify 21 independent frequencies, including three complete and three incomplete dipole modes, with an average frequency splitting of 20.37 +/- 0.40 mu Hz. Our analyses reveal a rotation period of EPIC 248705247 of approximately 6.82 +/- 0.07 hr, making it one of the most rapidly rotating DBV stars currently known. We utilize the White Dwarf Evolution Code (WDEC) to compute models to look for the seismic best-fitted model, yielding the following stellar parameters: M/M circle dot = 0.650 +/- 0.003, T eff = 23,660 +/- 68 K, log(Menv/M*)=-2.01 +/- 0.01 and log(MHe/M*)=-4.90 +/- 0.05 . We also explore the phenomenon of mode trapping, as well as the potential influence of a weak magnetic field. We find that this star is located near the red edge of the theoretical instability strip of DBVs. Hence, our asteroseismological analysis of EPIC 248705247 provides the properties and behaviors of a rapidly rotating DBV. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[12090040]; National Natural Science Foundation of China (NSFC)[12090042]; China Manned Space Project; LAMOST fellowship as a Youth Researcher - Special Funding for Advanced Users; China Postdoctoral Science Foundation[2023M730297]; National Natural Science Foundation of China (NSFC)[12273002]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN36000101]; NASA's Science Mission Directorate |
| 项目资助者 | National Natural Science Foundation of China (NSFC)[12090040, 12090042] ; China Manned Space Project ; LAMOST fellowship as a Youth Researcher - Special Funding for Advanced Users ; China Postdoctoral Science Foundation[2023M730297] ; National Natural Science Foundation of China (NSFC)[12273002] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN36000101] ; NASA's Science Mission Directorate |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 恒星与银河系 |
| 文章类型 | Article |
| 出版者 | IOP Publishing Ltd |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:001353909000001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | WHOLE EARTH TELESCOPE ; WHITE-DWARF STARS ; EQUATION-OF-STATE ; ZZ-CETI STARS ; SPECTROSCOPIC ANALYSIS ; PULSATIONAL PROPERTIES ; EVOLUTIONARY MODELS ; COMPACT PULSATORS ; MAGNETIC-FIELDS ; KIC 08626021 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/27685 |
| 专题 | 恒星物理研究组 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China; [email protected]; 2.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 5.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China; 6.Institute of Astrophysics, Chuxiong Normal University, Chuxiong 675000, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, Jiayi,Fu, Jianning,Cang, Tianqi,et al. Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247[J]. ASTROPHYSICAL JOURNAL,2024,976(1). |
| APA | Zhang, Jiayi.,Fu, Jianning.,Cang, Tianqi.,苏杰.,Chen, Yanhui.,...&Meng, Gang.(2024).Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247.ASTROPHYSICAL JOURNAL,976(1). |
| MLA | Zhang, Jiayi,et al."Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247".ASTROPHYSICAL JOURNAL 976.1(2024). |
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| Asteroseismology of （3564KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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