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Asteroseismology of Triple-mode Radial δ Scuti Star: TIC 400562821

文献类型：期刊论文

作者Sun, Xiao-Ya4; Zuo, Zhao-Yu4; Yang, Tao-Zhi4; Lares-Martiz, Mariel1; Li Z(李志)3; Guo, Zhao2
刊名ASTROPHYSICAL JOURNAL
出版日期2024-11-01
卷号976期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ad87eb
产权排序第3完成单位
文献子类Article
英文摘要We investigated the pulsating behavior of TIC 400562821 using high-precision observations from TESS. Fourier analysis of time-series data revealed three independent frequencies. The period ratios of F to F1 (0.774) and F to F2 (0.625), along with an amplitude change of approximately 0.1 mag, indicate that TIC 400562821 is a triple-mode High-Amplitude delta Scuti (HADS) star. Using the Best Parent Method and the Gamma (O) functions, we identified that the harmonics and sum combination frequencies of F and F1 are caused by the nonlinear response of the stellar medium to pulsation. We also analyzed the amplitude variations of F, F1, and F2. Observational data over 76 days show stable amplitudes for these modes. However, Radial Stellar Pulsations modeling suggests that, over 10,000 cycles, the amplitude of F remains constant, while F1 gradually decreases and F2 approaches zero. This implies that TIC 400562821 may eventually evolve into a single-mode HADS star. Furthermore, asteroseismic modeling was performed, and several effects, such as the mixing-length parameter alpha MLT and nonadiabatic, were examined on this star. In view of the results by Daszy & nacute;ska-Daszkiewicz et al. (i.e., alpha (MLT )< similar to 1 for delta Scuti stars), TIC 400562821 is suggested to be more likely in the post-main-sequence stage, with mass M = 1.34-1.38 M (circle dot) and metallicity Z = 0.007-0.008, but still warrants further study to ascertain its nature.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词CONVECTIVE BOUNDARIES ; 1ST OVERTONE ; MODULES ; ROTATION ; IDENTIFICATION ; PULSATION ; MASSES
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12473043]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12003020]; National Natural Science Foundation of China[AST-1910396]; National Natural Science Foundation of China[AST-2108975]; NSF[80NSSC22K0622]; NSF[80NSSC21K0245]; NSF[NNX16AB76G]; NASA[101071505]; European Research Council (ERC) under the Horizon Europe program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001352768600001
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[12473043, 12003020] ; National Natural Science Foundation of China[AST-1910396, AST-2108975] ; NSF[80NSSC22K0622, 80NSSC21K0245, NNX16AB76G] ; NASA[101071505] ; European Research Council (ERC) under the Horizon Europe program
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27687]  
专题云南天文台_恒星物理研究组
作者单位1.Embry-Riddle Aeronautical University, USA;
2.Institute of Astronomy (IvS), KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
4.Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China; zuozyu@xjtu.edu.cn;
推荐引用方式
GB/T 7714		 Sun, Xiao-Ya,Zuo, Zhao-Yu,Yang, Tao-Zhi,et al. Asteroseismology of Triple-mode Radial δ Scuti Star: TIC 400562821[J]. ASTROPHYSICAL JOURNAL,2024,976(1).
APA Sun, Xiao-Ya,Zuo, Zhao-Yu,Yang, Tao-Zhi,Lares-Martiz, Mariel,李志,&Guo, Zhao.(2024).Asteroseismology of Triple-mode Radial δ Scuti Star: TIC 400562821.ASTROPHYSICAL JOURNAL,976(1).
MLA Sun, Xiao-Ya,et al."Asteroseismology of Triple-mode Radial δ Scuti Star: TIC 400562821".ASTROPHYSICAL JOURNAL 976.1(2024).

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来源：云南天文台

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