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Two High-amplitude δ Scuti-γ Doradus Hybrids Constrained by the Radial Fundamental p and Equally Spaced g Modes

文献类型：期刊论文

作者Chen XH(陈兴浩)1,4,6; Zhang, Xiaobin5; Li Y(李焱)2,3,4,6; Su J(苏杰)1,4,6
刊名ASTROPHYSICAL JOURNAL
出版日期2024-03-01
卷号963期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ad2266
产权排序第1完成单位
文献子类Article
英文摘要Based on 2 minutes cadence TESS data, we investigate pulsations of TIC 65138566 and TIC 139729335 and discover them to be two new high-amplitude delta Scuti stars with equally spaced g modes. We recognize the radial fundamental mode f(1) = 18.3334 c d(-1) and the first overtone f(3) = 23.6429 c d(-1) for TIC 65138566, and identify the highest peak f(1) = 19.0955 c d(-1) as the radial fundamental mode for TIC 139729335. For g modes, both stars display a regular period spacing of 2413 s. Through detailed seismological analysis, we deduce that these period-spacing patterns correspond to modes with l = 1. Moreover, our analysis reveals that with increases in masses and metallicities, the star should display a higher degree of evolution to match a specific period spacing Pi(0). Conversely, the star should have a lower extent of evolution to match the radial fundamental mode. These two contradictory behaviors allow us to precisely obtain stellar physical parameters. TIC 65138566 and TIC 139729335 are determined to be two main-sequence stars that have almost the same range of masses and metallicities, with M = 1.36 +/- 0.06 M-circle dot and Z = 0.005 +/- 0.002. The hydrogen abundance in the core of TIC 65138566 is estimated to be about 0.28, while TIC 139729335 has a slightly higher value of around 0.31. Finally, we suggest that the high-amplitude delta Scuti-gamma Doradus star TIC 308396022 is a main-sequence star with M = 1.54 +/- 0.08 M-circle dot, Z = 0.007 +/- 0.001, and X-c = 0.18 +/- 0.02.
学科主题天文学
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出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词TO-CORE ROTATION ; PERIOD SPACINGS ; ASTEROSEISMIC MEASUREMENT ; COMBINATION FREQUENCIES ; MAIN-SEQUENCE ; STAR ; PULSATION ; MODULES ; CONVECTION ; IDENTIFICATION
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[2021YFA1600400/2021YFA1600402]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[XDB41000000]; National Key R&D Program of China; Chinese Academy of Sciences[12173080]; Chinese Academy of Sciences[12373037]; Chinese Academy of Sciences[12133011]; Chinese Academy of Sciences[12288102]; National Natural Science Foundation of China; Yunnan Revitalization Talent Support Program Young Talent Project[202101AT070006]; Yunnan Fundamental Research Projects; Youth Innovation Promotion Association of the Chinese Academy of Sciences[202302AN360001]; International Centre of Supernovae at the Yunnan Key Laboratory[CMS-CSST-2021-A10]; China Manned Space Project; Light of West China Program; NASA Explorer Program[NAS 5-26555]; Association of Universities for Research in Astronomy, Inc., under NASA
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001181418700001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[2021YFA1600400/2021YFA1600402, XDB41000000] ; National Key R&D Program of China ; Chinese Academy of Sciences[12173080, 12373037, 12133011, 12288102] ; National Natural Science Foundation of China ; Yunnan Revitalization Talent Support Program Young Talent Project[202101AT070006] ; Yunnan Fundamental Research Projects ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[202302AN360001] ; International Centre of Supernovae at the Yunnan Key Laboratory[CMS-CSST-2021-A10] ; China Manned Space Project ; Light of West China Program ; NASA Explorer Program[NAS 5-26555] ; Association of Universities for Research in Astronomy, Inc., under NASA
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/26555]  
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.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
4.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; chenxinghao1003@163.com;
5.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China;
6.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China;
推荐引用方式
GB/T 7714		 Chen XH,Zhang, Xiaobin,Li Y,et al. Two High-amplitude δ Scuti-γ Doradus Hybrids Constrained by the Radial Fundamental p and Equally Spaced g Modes[J]. ASTROPHYSICAL JOURNAL,2024,963(2).
APA 陈兴浩,Zhang, Xiaobin,李焱,&苏杰.(2024).Two High-amplitude δ Scuti-γ Doradus Hybrids Constrained by the Radial Fundamental p and Equally Spaced g Modes.ASTROPHYSICAL JOURNAL,963(2).
MLA 陈兴浩,et al."Two High-amplitude δ Scuti-γ Doradus Hybrids Constrained by the Radial Fundamental p and Equally Spaced g Modes".ASTROPHYSICAL JOURNAL 963.2(2024).

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来源：云南天文台

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