Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817
文献类型：期刊论文
| 作者 | Lv, Chenglong4,5; Esamdin, Ali4,5 ; Pascual-Granado, J.3; Hernandez, A. Garcia2; Hasanzadeh, A.1
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2022-11-01 |
| 卷号 | 164期号:5页码:8 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ac9473 |
| 通讯作者 | Esamdin, Ali(aliyi@xao.ac.cn) |
| 英文摘要 | We propose that TIC 448892817 is a double-mode high-amplitude delta Scuti star. The radial modes detected in this star provide a unique opportunity to exploit asteroseismic techniques up to their limits. 30 significant frequencies are detected by frequency analysis, while two of them are independent frequencies, i.e., F0 = 13.43538(2) day(-1) and F1 = 17.27007(4) day(-1). The ratio of f (1)/f (2) is measured to be 0.777957(2), suggesting that this target is a double-mode delta Scuti star. Nearly all the light variation is due to these two modes and their combination frequencies, but several other frequencies of very low amplitude are also present. The stellar evolutionary models were constructed with different mass M and metallicity Z using Modules for Experiments in Stellar Astrophysics (MESA). The frequency ratio f (1)/f (2) obtained by the model is smaller than those obtained by observation. This might be caused by the rotation of the star pointing that rotational effects are more important than previously thought in HADS stars. This is something that deserves to be investigated in future works with models including rotational effects for moderate to intermediate rotators such as FILOU. On the other hand, the parameters obtained from MESA agree well with previous results as well as by observational spectra. The best-fitting model shows that TIC 448892817 is close to entering the first turnoff of the main sequence. In order to accurately determine the effective temperature and metallicities, thus further narrowing the parameter space of this star, we suggest high-resolution spectra is highly desired in the future. |
| WOS关键词 | PETERSEN DIAGRAMS ; PULSATION ; ROTATION ; MODULATION ; PHOTOMETRY ; PARAMETER ; VARIABLES ; MISSION ; STRIP |
| 资助项目 | Spanish public funds for research[PID2019-107061GB-C63] ; 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 ; State Agency for Research through the Center of Excellence Severo Ochoa award[SEV-2017-0709] ; Spanish Ministry of Science, Innovation and Universities (MCIU) ; FEDER/Junta de AndaluciaConsejeria de Economia y Conocimiento[E-FQM-041-UGR18] ; Universidad de Granada ; Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) ; National Development and Reform Commission ; Chinese Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP Publishing Ltd |
| WOS记录号 | WOS:000876066500001 |
| 资助机构 | Spanish public funds for research ; 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 ; State Agency for Research through the Center of Excellence Severo Ochoa award ; Spanish Ministry of Science, Innovation and Universities (MCIU) ; FEDER/Junta de AndaluciaConsejeria de Economia y Conocimiento ; Universidad de Granada ; Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) ; National Development and Reform Commission ; Chinese Academy of Sciences |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4936]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 通讯作者 | Esamdin, Ali |
| 作者单位 | 1.Univ Tehran, Inst Geophys, Tehran, Iran 2.Univ Granada, Dept Theoret Phys & Cosmol, E-18071 Granada, Spain 3.Inst Astrofis Andalucia CSIC, E-18008 Granada, Spain 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lv, Chenglong,Esamdin, Ali,Pascual-Granado, J.,et al. Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817[J]. ASTRONOMICAL JOURNAL,2022,164(5):8. |
| APA | Lv, Chenglong,Esamdin, Ali,Pascual-Granado, J.,Hernandez, A. Garcia,&Hasanzadeh, A..(2022).Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817.ASTRONOMICAL JOURNAL,164(5),8. |
| MLA | Lv, Chenglong,et al."Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817".ASTRONOMICAL JOURNAL 164.5(2022):8. |
入库方式： OAI收割
来源：新疆天文台
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