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Exploring the convective core of the high-amplitude δ Scuti star TIC 120857354 with asteroseismology

文献类型：期刊论文

作者Chen XH(陈兴浩)1,5,6; Zhang, Xiaobin2; Li Y(李焱)1,3,4,5
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2024-12-18
卷号536期号:2页码:1778-1790
关键词stars: individual: TIC 120857354 stars: oscillations stars: variables: Scuti
ISSN号0035-8711
DOI10.1093/mnras/stae2658
产权排序第1完成单位
文献子类Article
英文摘要Based on 2-min cadence TESS data, 20 confident independent frequencies were identified for the star TIC 120857354. The Kolmogorov-Smirnov test reveals a rotational splitting of 2.40 mu Hz and a uniform frequency spacing of 74.6 mu Hz. Subsequently, five sets of rotational splittings were discerned, including a quintuplet and four pairs of doublets, aligning with the characteristics of p-mode rotational splitting. Based on the sets of rotational splittings and the uniform frequency spacing, we finally identified four radial modes, six dipole modes, and 10 quadrupole modes. Furthermore, we found that the frequency separations within the l = 2 sequences show a decreasing trend towards lower order modes, analogous to the l = 0 sequences. A grid of theoretical models were computed to match the identified frequencies, revealing that TIC 120857354 is a main-sequence star with M = 1.54 +/- 0.04 M-circle dot, Z = 0.015 +/- 0.003, T-eff = 7441 +/- 370 K, log g = 4.27 +/- 0.01, R = 1.52 +/- 0.01 R-circle dot, L = 6.33 +/- 1.53 L-circle dot, age = 0.53 +/- 0.07 Gyr, and X-c/X-0 = 0.84 +/- 0.05. In-depth analyses suggest that l = 2 may be p-dominated mixed modes with pronounced g-mode characteristics, enabling us to probe deeper into interiors of the star and determine the relative size of the convective core to be R-c/R = 0.092 +/- 0.002.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词PULSATION MODES ; MAIN-SEQUENCE ; NONRADIAL PULSATION ; INSTABILITY STRIP ; UNEXPECTED SERIES ; ANGULAR-MOMENTUM ; MESA ; FREQUENCY ; ROTATION ; MODULES
资助项目National Natural Science Foundation of China[12173080]; National Natural Science Foundation of China[12133011]; National Natural Science Foundation of China[12433009]; National Natural Science Foundation of China[12373037]; National Natural Science Foundation of China[2021YFA1600400/2021YFA1600402]; National Key R&D Program of China; Chinese Academy of Sciences; China Manned Space Project; Yunnan Revitalization Talent Support Program Young Talent Project; Youth Innovation Promotion Association of the Chinese Academy of Sciences[202302AN360001]; International Centre of Supernovae Yunnan Key Laboratory; 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:001380380500001
出版者OXFORD UNIV PRESS
资助机构National Natural Science Foundation of China[12173080, 12133011, 12433009, 12373037] ; National Natural Science Foundation of China[2021YFA1600400/2021YFA1600402] ; National Key R&D Program of China ; Chinese Academy of Sciences ; China Manned Space Project ; Yunnan Revitalization Talent Support Program Young Talent Project ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[202302AN360001] ; International Centre of Supernovae Yunnan Key Laboratory ; 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/114a53/27937]  
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.Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming 650216, China;
2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;
3.University of Chinese Academy of Sciences, Beijing 100049, China;
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
5.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming 650216, China;
6.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China;
推荐引用方式
GB/T 7714		 Chen XH,Zhang, Xiaobin,Li Y. Exploring the convective core of the high-amplitude δ Scuti star TIC 120857354 with asteroseismology[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,536(2):1778-1790.
APA 陈兴浩,Zhang, Xiaobin,&李焱.(2024).Exploring the convective core of the high-amplitude δ Scuti star TIC 120857354 with asteroseismology.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,536(2),1778-1790.
MLA 陈兴浩,et al."Exploring the convective core of the high-amplitude δ Scuti star TIC 120857354 with asteroseismology".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 536.2(2024):1778-1790.

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