Inter-correlation between Sunspot Oscillations and Their Internal Structures

作     者：Libo Fu Zizhan Zhu Ding Yuan Jiaoyang Wang Song Feng Sergey Anfinogentov Libo Fu;Zizhan Zhu;Ding Yuan;Jiaoyang Wang;Song Feng;Sergey Anfinogentov

作者机构：Institute of Space Science and Applied TechnologyHarbin Institute of TechnologyShenzhen 518055China Faculty of Information Engineering and AutomationKunming University of Science and TechnologyKunming 650500China Institute of Solar-Terrestrial Physics SB RASLermontov st.126a664033IrkutskRussia 

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

年 卷 期：2022年第22卷第11期

页      面：97-106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 National Natural Science Foundation of China(NSFC,Grant Nos.12173012 and 12111530078) the Shenzhen Technology project(GXWD20201230155427003-20200804151658001) supported by the Joint Funds of the NSFC(U1931107) 

主　　题：(Sun:)sunspots Sun:oscillations methods:data analysis 

摘      要：Three-and five-minute oscillations are commonly observed in any *** they are modulated by the internal thermal and magnetic structures of a sunspot,they could be used as an effective tool for researching sunspot *** this paper,we investigate the properties of oscillations in sunspot groups with varying sizes and magnetic fields,and aim to establish the relationships between sunspot oscillations and its internal structure *** selected three groups of the unipolar sunspot with approximately axial-symmetric magnetic field and calculated their Fourier spectra based on the ultraviolet/extreme ultraviolet emission intensity variations recorded by the Solar Dynamics Observatory/Atmospheric Imaging *** found that the distribution of three-minute oscillation is defined by the joint effect of diverging magnetic field and the stratification of the sunspot *** distribution could be modified by any invading magnetic structures in the *** contrast,the five-minute oscillations are more prominent in small spots,implying that five-minute oscillation is very closely connected with umbral dynamics.