K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705 | |
Ma, Xiao-Yu6; Zong, Weikai6; Fu, Jian-Ning6; Reed, M. D.5; Wang, Jiaxin4,6; Charpinet, Stéphane3; Su J(苏杰)1,2 | |
刊名 | ASTROPHYSICAL JOURNAL |
2022-07-01 | |
卷号 | 933期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ac75b8 |
产权排序 | 第5完成单位 |
文献子类 | Article |
英文摘要 | We present an analysis of oscillation mode variability in the hot B subdwarf star EPIC 220422705, a new pulsator discovered from similar to 78 days of K2 photometry. The high-quality light curves provide a detection of 66 significant independent frequencies, from which we identified nine incomplete potential triplets and three quintuplets. Those g- and p-multiplets give rotation periods of similar to 36 and 29 days in the core and at the surface, respectively, potentially suggesting a slightly differential rotation. We derived a period spacing of 268.5 s and 159.4 s for the sequence of dipole and quadrupole modes, respectively. We characterized the precise patterns of amplitude and frequency modulations (AM and FM) of 22 frequencies with high enough amplitude for our science. Many of them exhibit intrinsic and periodic patterns of AM and FM, with periods on a timescale of months as derived by the best fitting and Markov Chain Monte Carlo test. The nonlinear resonant mode interactions could be a natural interpretation for such AMs and FMs after other mechanisms are ruled out. Our results are the first step to building a bridge between mode variability from K2 photometry and the nonlinear perturbation theory of stellar oscillation. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | National Natural Science Foundation of China (NSFC)[11833002] ; National Natural Science Foundation of China (NSFC)[11903005] ; National Natural Science Foundation of China (NSFC)[12090040] ; National Natural Science Foundation of China (NSFC)[12090042] ; Fundamental Research Funds for the Central Universities ; Agence Nationale de la Recherche (ANR, France)[ANR-17-CE31-0018] ; Centre National d'Etudes Spatiales (CNES, France) ; NASA's Science Mission Directorate |
WOS关键词 | COMPACT PULSATORS ; AMPLITUDE EQUATIONS ; DRIVING MECHANISM ; PERIOD SPACINGS ; GRAVITY MODES ; PARAMETERS ; ASTEROSEISMOLOGY ; RESONANCES ; DISCOVERY ; ROTATION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000825851500001 |
资助机构 | National Natural Science Foundation of China (NSFC)[11833002, 11903005, 12090040, 12090042] ; Fundamental Research Funds for the Central Universities ; Agence Nationale de la Recherche (ANR, France)[ANR-17-CE31-0018] ; Centre National d'Etudes Spatiales (CNES, France) ; NASA's Science Mission Directorate |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25341] |
专题 | 云南天文台_恒星物理研究组 |
通讯作者 | Zong, Weikai |
作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 3.Institut de Recherche en Astrophysique et Planétologie, CNRS, Université de Toulouse, CNES, 14 Avenue Edouard Belin, F-31400 Toulouse, France; 4.College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, People's Republic of China; 5.Department of Physics, Astronomy and Materials Science, Missouri State University, 901 S. National, Springfield, MO, 65897, USA; 6.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China; weikai.zong@bnu.edu.cn, jnfu@bnu.edu.cn; |
推荐引用方式 GB/T 7714 | Ma, Xiao-Yu,Zong, Weikai,Fu, Jian-Ning,et al. K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705[J]. ASTROPHYSICAL JOURNAL,2022,933(2). |
APA | Ma, Xiao-Yu.,Zong, Weikai.,Fu, Jian-Ning.,Reed, M. D..,Wang, Jiaxin.,...&Su J.(2022).K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705.ASTROPHYSICAL JOURNAL,933(2). |
MLA | Ma, Xiao-Yu,et al."K2 Photometry on Oscillation Mode Variability: The New Pulsating Hot B Subdwarf Star EPIC 220422705".ASTROPHYSICAL JOURNAL 933.2(2022). |
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