Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed δ Scuti stars
文献类型：期刊论文
| 作者 | Lv, C.3,5 ; Esamdin, A.3,5; Hasanzadeh, A.1,2; Ghazinejad, M.7; Pascual-Granado, J.6; Mirouh, G. M.4; Karimov, R.8
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2024-06-11 |
| 卷号 | 686页码:A174 |
| 关键词 | asteroseismology stars: oscillations stars: statistics stars: variables: delta Scuti |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202346985 |
| 产权排序 | 1 |
| 英文摘要 | Context. Over the last few years, delta Scuti stars have been at the center of the attention of the asteroseismology community thanks to the derivation of seismic indices connected to stellar parameters. The statistical analysis of the wealth of data offered by a large space survey such as the Transiting Exoplanet Survey Satellite (TESS), the identification of new delta Scuti stars, and the correlation between asteroseismic indices and stellar parameters in the resulting sample are therefore of utmost interest. Aims. The goal of our study is to analyze the statistical properties of stellar parameters and characterize the asteroseismic indices of delta Scuti stars observed in TESS cycle 4. Methods. We used TESS 2 min cadence photometric data and the corresponding Fourier transform to identify delta Scuti stars. The asteroseismic indices for these stars were determined using an empirical relation and a 2D autocorrelation method. Results. We discovered 765 delta Scuti stars from the data obtained by the TESS mission, from Sectors 40-55, corresponding to cycle 4 and observed with a 2 min cadence. Of these stars, 179 delta Scuti stars have low-resolution spectral parameters from LAMOST. We first analyzed the relation between pulsation and stellar parameters from TESS observations and the distribution of delta Scuti stars with two different stellar parameters, TESS Input Catalog (TIC) and Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), within the classical instability strip. Most of the stars lie within the instability strip and follow the period-luminosity relation of delta Scuti stars. Additionally, the majority of the stars exhibit pulsation properties consistent with those expected for delta Scuti stars, including periods falling within the typical range, amplitudes at the millimagnitude level, and fundamental parameters such as spectral type, effective temperature, log g, and luminosity that match the characteristics of delta Scuti stars. This confirms the reliability of the delta Scuti stars we have identified. We subsequently obtained the large frequency separation (triangle nu), v(max), and nu(Amax) for 179 delta Scuti stars with LAMOST parameters by using an empirical relation and a 2D autocorrelation method, and obtained the relations between these asteroseismic indices. These stars will provide significant support for a deeper study of the internal structure and evolution of stars. |
| WOS关键词 | SOLAR-LIKE OSCILLATIONS ; MAIN-SEQUENCE ; AMPLITUDE-MODULATION ; ECLIPSING BINARIES ; MODE OSCILLATIONS ; SCALING RELATIONS ; PULSATION MODES ; KEPLER ; SCT ; ROTATION |
| 资助项目 | National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Project[2022YFE0126200] ; Tianshan Talent Training Program[2023TSYCLJ0053] ; China Scholarship Council[202204910463] ; Science and Technology Facilities Council (STFC) grant[ST/X000915/1] ; Programas Estatales de Generacion de Conocimiento y Fortalecimiento Cientifico y Tecnologico del Sistema de I+D+i y de I+D+i Orientada a los Retos de la Sociedad[PID2019-107061GB-C63] ; Severo Ochoa grant - MCIN/AEI[CEX2021-001131-S] ; Spanish State Research Agency (AEI)[PID2019-107061GB-064] ; National Development and Reform Commission |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001244461900002 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Project ; Tianshan Talent Training Program ; China Scholarship Council ; Science and Technology Facilities Council (STFC) grant ; Programas Estatales de Generacion de Conocimiento y Fortalecimiento Cientifico y Tecnologico del Sistema de I+D+i y de I+D+i Orientada a los Retos de la Sociedad ; Severo Ochoa grant - MCIN/AEI ; Spanish State Research Agency (AEI) ; National Development and Reform Commission |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6796]  |
| 专题 | 光学天文与技术应用研究室_变星研究团组 |
| 通讯作者 | Esamdin, A. |
| 作者单位 | 1.Univ Tehran, Inst Geophys, Tehran, Iran 2.Univ Warwick, Ctr Fus Space & Astrophys, Dept Phys, Coventry CV4 7AL, England 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 4.Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva S-N, Granada 18071, Spain 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 6.Inst Astrofis Andalucia CSIC, Granada 18008, Spain 7.Univ Qom, Fac Sci, Dept Phys, Qom, Iran 8.Uzbek Acad Sci, Ulugh Beg Astron Inst, Tashkent 100052, Uzbekistan |
| 推荐引用方式 GB/T 7714 | Lv, C.,Esamdin, A.,Hasanzadeh, A.,et al. Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed δ Scuti stars[J]. ASTRONOMY & ASTROPHYSICS,2024,686:A174. |
| APA | Lv, C..,Esamdin, A..,Hasanzadeh, A..,Ghazinejad, M..,Pascual-Granado, J..,...&Karimov, R..(2024).Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed δ Scuti stars.ASTRONOMY & ASTROPHYSICS,686,A174. |
| MLA | Lv, C.,et al."Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed δ Scuti stars".ASTRONOMY & ASTROPHYSICS 686(2024):A174. |
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来源：新疆天文台
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