KIC 2857323: A Double-mode High-amplitude delta Scuti Star with Amplitude Decline of the First Overtone Mode
文献类型：期刊论文
| 作者 | Yang, Tao-Zhi2 ; Zuo, Zhao-Yu2; Sun, Xiao-Ya2; Tang, Rui-Xuan2; Esamdin, Ali1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2022-09-01 |
| 卷号 | 936期号:1页码:8 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac86c9 |
| 通讯作者 | Zuo, Zhao-Yu(zuozyu@xjtu.edu.cn) |
| 英文摘要 | We investigate the pulsating behavior of KIC 2857323 using high-precision observations from the Kepler mission. Fourier analysis of 4 yr time-series data reveals five independent frequencies for the light variation. Among them, two strong frequencies f (1) and f (3) with a period ratio of 0.774 identify this star as a double-mode (i.e., the fundamental mode F0 and first overtone mode F1) high-amplitude delta Scuti star (HADS). Seismic modeling using the two radial modes F0 and F1 indicates that KIC 2857323 is a main-sequence star with mass M = 1.78 +/- 0.02 M (circle dot) and metallicity Z from 0.009 to 0.012. We analyze the phase and amplitude variations of F0 and F1 using the phase modulation method and find that the first overtone mode F1 shows a slow decline in amplitude. We discuss several possible causes for the amplitude variation and speculate that the amplitude decline in this star may be due to pulsation energy loss. We note that KIC 2857323 is the first double-mode HADS to show amplitude decline and warrants further study to ascertain its nature. |
| WOS关键词 | PULSATION MODES ; KEPLER ; MODULATION ; FREQUENCY ; ASTEROSEISMOLOGY ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[12003020] ; National Natural Science Foundation of China[U1938104] ; National Natural Science Foundation of China[U2031209] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000847575300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4857]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 通讯作者 | Zuo, Zhao-Yu |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Xi An Jiao Tong Univ, Sch Phys, Key Lab Nonequilibrium Synth & Modulat Condensed, Minist Educ, Xian 710049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Tao-Zhi,Zuo, Zhao-Yu,Sun, Xiao-Ya,et al. KIC 2857323: A Double-mode High-amplitude delta Scuti Star with Amplitude Decline of the First Overtone Mode[J]. ASTROPHYSICAL JOURNAL,2022,936(1):8. |
| APA | Yang, Tao-Zhi,Zuo, Zhao-Yu,Sun, Xiao-Ya,Tang, Rui-Xuan,&Esamdin, Ali.(2022).KIC 2857323: A Double-mode High-amplitude delta Scuti Star with Amplitude Decline of the First Overtone Mode.ASTROPHYSICAL JOURNAL,936(1),8. |
| MLA | Yang, Tao-Zhi,et al."KIC 2857323: A Double-mode High-amplitude delta Scuti Star with Amplitude Decline of the First Overtone Mode".ASTROPHYSICAL JOURNAL 936.1(2022):8. |
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来源：新疆天文台
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