Pulsation Analysis of High-AmplitudeδScuti Stars with TESS  

作　　者：薛王俊婷 牛家树 薛会芳 银思静 Wangjunting Xue;Jia-Shu Niu;Hui-Fang Xue;Sijing Yin(Institute of Theoretical Physics,Shanxi University,Taiyuan 030006,China;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University,Taiyuan 030006,China;Department of Physics,Taiyuan Normal University,Jinzhong 030619,China;Institute of Computational and Applied Physics,Taiyuan Normal University,Jinzhong 030619,China;College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China)

机构地区：[1]Institute of Theoretical Physics,Shanxi University,Taiyuan 030006,China [2]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Shanxi University,Taiyuan 030006,China [3]Department of Physics,Taiyuan Normal University,Jinzhong 030619,China [4]Institute of Computational and Applied Physics,Taiyuan Normal University,Jinzhong 030619,China [5]College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China

出　　处：《Research in Astronomy and Astrophysics》2023年第7期15-24,共10页天文和天体物理学研究（英文版）

基　　金：support from the National Natural Science Foundation of China(NSFC)(Nos.12005124 and 12147215);support from the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(STIP)(No.2020L0528);the Applied Basic Research Programs of Natural Science Foundation of Shanxi Province(No.202103021223320)。

摘　　要：In this work,the pulsation analysis is performed on 83 high-amplitudeδScuti stars(HADS),which have been observed by the Transiting Exoplanet Survey Satellite.The results show that 49 of these HADS show single-mode pulsation,27 of them show radial double-modes pulsation(in which 22 of them pulsate with the fundamental and first overtone modes and five of them pulsate with the first and second overtone modes),and seven of them show radial triple-modes pulsation(three of which are newly confirmed triple-mode HADS).The histogram of the fundamental periods and the ratios between the fundamental and first overtone periods show bimodal structures,which might be caused by the stellar evolution in this specific phase.Most of the radial triple-mode HADS have a fundamental amplitude of 41-54 mmag,and 50%of them have similar amplitudes of the fundamental and first overtone pulsation modes.All these hints require further confirmation not only in observations with more HADS samples,but also in theoretical models with suitable treatments of stellar evolution and pulsation.

关 键 词：stars:variables:delta Scuti stars:oscillations(including pulsations) stars:evolution 

分 类 号：P145.2[天文地球—天体物理]