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Distinguishing super-Nyquist frequencies via their temporal variation in γ Doradus stars from continuous photometry

文献类型：期刊论文

作者Wang, Xuan8,9,10; Zong, Weikai8,9,10; Ma, Xiao-Yu4; Charpinet, Stéphane5; Wu T(吴涛)1,3,6,7,10; Wang, Haotian2
刊名Astronomy and Astrophysics
出版日期2025-12-01
卷号693
关键词methods: statistical techniques: photometric stars: oscillations
ISSN号0004-6361
DOI10.1051/0004-6361/202452309
产权排序第6完成单位
文献子类Journal article (JA)
英文摘要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.
学科主题天文学
URL标识查看原文
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]
语种英语
资助机构National Natural Science Foundation of China[12090040, 12090042, 12273002]
源URL[http://ir.ynao.ac.cn/handle/114a53/28071]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China;
2.Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, Leuven, 3001, Belgium
3.University of Chinese Academy of Sciences, Beijing, 100049, 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.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, China;
7.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China;
8.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing, 102206, China;
9.School of Physics and Astronomy, Beijing Normal University, Beijing, 100875, China;
10.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, 650216, China;
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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