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

doi:10.1093/mnras/stae2658

YNAO OpenIR > 恒星物理研究组

	Exploring the convective core of the high-amplitude δ Scuti star TIC 120857354 with asteroseismology
	Chen XH(陈兴浩)1,2,3 ; Zhang, Xiaobin 4; Li Y(李焱)1,2,5,6
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2024-12-18
卷号	536 期号:2 页码:1778-1790
DOI	10.1093/mnras/stae2658
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	stars: individual: TIC 120857354 stars: oscillations stars: variables: Scuti
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.
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
项目资助者	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
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	OXFORD UNIV PRESS
出版地	GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN	0035-8711
URL	查看原文
WOS记录号	WOS:001380380500001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	PULSATION MODES ; MAIN-SEQUENCE ; NONRADIAL PULSATION ; INSTABILITY STRIP ; UNEXPECTED SERIES ; ANGULAR-MOMENTUM ; MESA ; FREQUENCY ; ROTATION ; MODULES
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27937
专题	恒星物理研究组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 for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming 650216, China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China; 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; 5.University of Chinese Academy of Sciences, Beijing 100049, China; 6.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
第一作者单位	中国科学院云南天文台
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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