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Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247

文献类型：期刊论文

作者Zhang, Jiayi5,6; Fu, Jianning5,6; Cang, Tianqi5,6; Su J(苏杰)2,3,4; Chen, Yanhui1,2; Ma, Xiaoyu5,6; Meng, Gang5,6
刊名ASTROPHYSICAL JOURNAL
出版日期2024-11-01
卷号976期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ad8561
产权排序第3完成单位
文献子类Article
英文摘要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.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词WHOLE EARTH TELESCOPE ; WHITE-DWARF STARS ; EQUATION-OF-STATE ; ZZ-CETI STARS ; SPECTROSCOPIC ANALYSIS ; PULSATIONAL PROPERTIES ; EVOLUTIONARY MODELS ; COMPACT PULSATORS ; MAGNETIC-FIELDS ; KIC 08626021
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
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001353909000001
出版者IOP Publishing Ltd
资助机构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
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27685]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Institute of Astrophysics, Chuxiong Normal University, Chuxiong 675000, People's Republic of China
2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
5.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China;
6.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China; jnfu@bnu.edu.cn;
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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来源：云南天文台

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