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| Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817 | |
Lv, Chenglong1,2 ; Esamdin, Ali1,2; Pascual-Granado, J.3; Hernandez, A. Garcia4; Hasanzadeh, A.5
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| 2022-11-01 | |
| Source Publication | ASTRONOMICAL JOURNAL
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| ISSN | 0004-6256 |
| Volume | 164Issue:5Pages:218 |
| Contribution Rank | 1 |
| Abstract | 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. |
| DOI | 10.3847/1538-3881/ac9473 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | PETERSEN DIAGRAMS ; PULSATION ; ROTATION ; MODULATION ; PHOTOMETRY ; PARAMETER ; VARIABLES ; MISSION ; STRIP |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000876066500001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | 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 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4937 |
| Collection | 光学天文与技术应用研究室 |
| Corresponding Author | Esamdin, Ali |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Inst Astrofis Andalucia CSIC, E-18008 Granada, Spain 4.Univ Granada, Dept Theoret Phys & Cosmol, E-18071 Granada, Spain 5.Univ Tehran, Inst Geophys, Tehran, Iran |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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):218. |
| 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),218. |
| MLA | Lv, Chenglong,et al."Asteroseismology of a Double-mode High-amplitude delta Scuti Star TIC 448892817".ASTRONOMICAL JOURNAL 164.5(2022):218. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Lv-2022-Asteroseismo（833KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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