Two High-amplitude δ Scuti-γ Doradus Hybrids Constrained by the Radial Fundamental p and Equally Spaced g Modes | |
Chen XH(陈兴浩)4,5,6; Zhang, Xiaobin1; Li Y(李焱)2,3,4,5; Su J(苏杰)4,5,6 | |
刊名 | ASTROPHYSICAL JOURNAL |
2024-03-01 | |
卷号 | 963期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/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 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
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关键词 | TO-CORE ROTATION ; PERIOD SPACINGS ; ASTEROSEISMIC MEASUREMENT ; COMBINATION FREQUENCIES ; MAIN-SEQUENCE ; STAR ; PULSATION ; MODULES ; CONVECTION ; IDENTIFICATION |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:001181418700001 |
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 |
内容类型 | 期刊论文 |
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 |
作者单位 | 1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China; 2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, 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 for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; 6.International Centre of Supernovae, Yunnan Key Laboratory, 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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