Hilbert Transform Reveals Unusual Modulation in Delta Scuti Star KIC 10407873
文献类型：期刊论文
| 作者 | Wang, Haozhi1,3 ; Esamdin, Ali1; Lv, Chenglong1; Shen, Lixian1,3; Karimov, Rivkat2; Ehgamberdiev, Shuhrat A.2,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2024-12-01 |
| 卷号 | 977期号:2页码:241 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad93bc |
| 产权排序 | 1 |
| 英文摘要 | We report a delta Scuti star, KIC 10407873, exhibiting significant amplitude modulation. Fourier analysis of Kepler long-cadence data (i.e., Q0-Q17, spanning 1471 days) reveals two distinct features: harmonic series of frequencies in the low-frequency region and the frequencies of the split triplet lines in the high-frequency region. Using the Hilbert transform method, we separated the amplitude modulation signals, obtaining precise parameters for the two modulation frequencies. For the harmonic series of frequencies in the low-frequency region, we isolated them through a prewhitening process. Based on the residual segmented spectrum and the phase-folding diagram, we propose that these harmonic series of frequencies may be caused by temperature inhomogeneity on the stellar surface and stellar rotation. The subsequent phase evolution diagrams we generated, combined with LAMOST's vsini data, further support this hypothesis. Consequently, this suggests that the cause of amplitude modulation in the high-frequency region is unrelated to stellar rotation. Finally, we discussed the information potentially carried by the isolated modulation signals, as well as the similarities between the star's dual-amplitude modulation and the periodically modulated Tseraskaya-Blazhko effect. |
| WOS关键词 | RR LYRAE ; KEPLER ; VELOCITIES |
| 资助项目 | National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Projecthttps://doi.org/10.13039/501100015217[2022YFE0126200] ; National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Projecthttps://doi.org/10.13039/501100015217[2023TSYCLJ0053] ; National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Project |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001379851800001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Projecthttps://doi.org/10.13039/501100015217 ; National Key R&D program of China for the Intergovernmental Scientific and Technological Innovation Cooperation Project |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7316]  |
| 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, Ali |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Uzbek Acad Sci, Ulugh Beg Astron Inst, Astronomicheskaya 33, Tashkent 100052, Uzbekistan 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 4.Natl Univ Uzbekistan, Tashkent 100052, Uzbekistan |
| 推荐引用方式 GB/T 7714 | Wang, Haozhi,Esamdin, Ali,Lv, Chenglong,et al. Hilbert Transform Reveals Unusual Modulation in Delta Scuti Star KIC 10407873[J]. ASTROPHYSICAL JOURNAL,2024,977(2):241. |
| APA | Wang, Haozhi,Esamdin, Ali,Lv, Chenglong,Shen, Lixian,Karimov, Rivkat,&Ehgamberdiev, Shuhrat A..(2024).Hilbert Transform Reveals Unusual Modulation in Delta Scuti Star KIC 10407873.ASTROPHYSICAL JOURNAL,977(2),241. |
| MLA | Wang, Haozhi,et al."Hilbert Transform Reveals Unusual Modulation in Delta Scuti Star KIC 10407873".ASTROPHYSICAL JOURNAL 977.2(2024):241. |
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来源：新疆天文台
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