| Distinguishing super-Nyquist frequencies via their temporal variation in γ Doradus stars from continuous photometry | |
Wang, Xuan1,2,3; Zong, Weikai1,2,3; Ma, Xiao-Yu4; Charpinet, Stéphane5; Wu T(吴涛)3,6,7,8,9 ; Wang, Haotian10
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| 发表期刊 | Astronomy and Astrophysics
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| 2025-12-01 | |
| 卷号 | 693 |
| DOI | 10.1051/0004-6361/202452309 |
| 产权排序 | 第6完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | methods: statistical techniques: photometric stars: oscillations |
| 摘要 | Given their tendency to mix in with real pulsations, the reflection of super-Nyquist frequencies (SNFs) pose a threat to asteroseismic properties. Although SNFs have been studied in several pulsating stars, a systematic survey remains to be explored. Here, we propose a method for identifying SNFs from Kepler and TESS photometry by characterizing their periodic frequency modulations using a sliding Fourier transform. After analyzing long-cadence photometry in the Kepler legacy, we identified 304 SNFs in 56 stars from 45 607 frequencies in ∼600 γ Doradus stars, corresponding to a fraction of approximately 0.67% and 9.2%, respectively. Most SNFs were detected in the frequency range of pressure mode over 120 μHz and the fraction of SNF detection increases as frequency up to ∼7%. We found only two potential SNFs mixed with gravity modes in two γ Doradus stars. These findings indicate that SNFs have a negligible impact on global seismic properties, such as those derived from period spacing in γ Doradus stars. However, we stress that SNFs must be carefully and systematically examined by this method in other pulsating stars, particularly δ Scuti and hot B subdwarf stars, to establish a solid foundation for the precise asteroseismolgy of various types of pulsators. © The Authors 2025. |
| 资助项目 | National Natural Science Foundation of China[12090040];National Natural Science Foundation of China[12090042];National Natural Science Foundation of China[12273002] |
| 项目资助者 | National Natural Science Foundation of China[12090040, 12090042, 12273002] |
| 语种 | 英语 |
| 学科领域 | 天文学 |
| 文章类型 | Journal article (JA) |
| ISSN | 0004-6361 |
| URL | 查看原文 |
| EI入藏号 | 20250417739948 |
| EI主题词 | Stars |
| EI分类号 | 1201.3 - 1301.1.4 - 1302.1.2 - 484 Seismology - 716.1 Information Theory and Signal Processing - 731.1 Control Systems - 941.2 Acoustic Variables Measurements - 942.1.3 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28071 |
| 专题 | 恒星物理研究组 中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing, 102206, China; 2.School of Physics and Astronomy, Beijing Normal University, Beijing, 100875, China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, 650216, China; 4.Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 19C, Liège, 4000, Belgium; 5.IRAP, CNRS, UPS, CNES, Université de Toulouse, 14 Av. Edouard Belin, Toulouse, 31400, France; 6.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China; 7.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China; 8.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China; 9.University of Chinese Academy of Sciences, Beijing, 100049, China; 10.Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, Leuven, 3001, Belgium |
| 推荐引用方式 GB/T 7714 | Wang, Xuan,Zong, Weikai,Ma, Xiao-Yu,et al. Distinguishing super-Nyquist frequencies via their temporal variation in γ Doradus stars from continuous photometry[J]. Astronomy and Astrophysics,2025,693. |
| APA | Wang, Xuan,Zong, Weikai,Ma, Xiao-Yu,Charpinet, Stéphane,吴涛,&Wang, Haotian.(2025).Distinguishing super-Nyquist frequencies via their temporal variation in γ Doradus stars from continuous photometry.Astronomy and Astrophysics,693. |
| MLA | Wang, Xuan,et al."Distinguishing super-Nyquist frequencies via their temporal variation in γ Doradus stars from continuous photometry".Astronomy and Astrophysics 693(2025). |
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