Stellar activity cycles as revealed by long-term beat-like patterns from light curves of Kepler

作     者：Heng-Geng Han Kai-Ming Cui Ji-Feng Liu Hui-Qin Yang Xuan Fang Rui-Ning Zhao Heng-Geng Han;Kai-Ming Cui;Ji-Feng Liu;Hui-Qin Yang;Xuan Fang;Rui-Ning Zhao

作者机构：CAS Key Laboratory of Optical AstronomyNational Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space SciencesUniversity of Chinese Academy of SciencesBeijing 100049China WHU-NAOC Joint Center for AstronomyWuhan UniversityWuhan 430072China Department of Physics&Laboratory for Space ResearchFaculty of Sciencethe University of Hong KongHong KongChina 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第6期

页      面：301-313页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB 41000000) support from the National Natural Science Foundation of China(NSFC,Grant Nos.11988101 and 113300034) the National Key Research and Development Program of China(NKRDPC,Grant Nos.2016YFA0400804,2019YFA0405000 and 2019YFA0405504) 

主　　题：stars:activity starspots stars:rotation 

摘      要：Stellar activity cycles have been found on many stars through different *** in debate,an empirical relation has been found where a period of stellar activity cycle Pcyc is positively correlated with rotation period Prot along some segregated *** this work,we built a systematic process to search for the Kepler objects that are analogous to the long-term solar brightness variations and investigate their possible *** a rigorous selection,we obtained 43 objects that all exhibit clear long-term beat-like patterns and their variability(amplitude of rotational modulation)periods and rotation periods were *** to the 4-year duration of the Kepler mission,our targets are located in the region where the cycle periods are longer than~1 yr and shorter than~2.5 ***,all of our targets exhibit clear and notable quasi-periodic variations in variability,yet we cannot confirm any linear trends that were predicted by previous research *** may suggest that in the Kepler realm of the Pcyc-Prot diagram,these relations would mix with each other or the beat-like patterns may not be related to the stellar cycle unless other evidence is provided.