Sunspot rotation and magnetic transients associated with flares in NOAAAR 11429  

作　　者：Jian-Chuan Zheng Zhi-Liang Yang Jian-Peng Guo Kai-Ming Guo Hui Huang Xuan Song Wei-Xing Wan 

机构地区：[1]Department of Astronomy, Beijing Normal University, Beijing 100875, China [2]Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy ofSciences, Beijing 100029, China [3]College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Research in Astronomy and Astrophysics》2017年第8期47-56,共10页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (41231068, 41374187, 41531073 and 41674147)

摘　　要：We analyze sunspot rotation and magnetic transients in NOAA AR 11429 during two X-class(X5.4 and X1.3)flares using data from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory.A large leading sunspot with positive magnetic polarity rotated counterclockwise.As expected,the rotation was significantly affected by the two flares.Magnetic transients induced by the flares were clearly evident in the sunspots with negative polarity.They were moving across the sunspots with speed of order 3-7 km s-1.Furthermore,the trend of magnetic flux evolution in these sunspots exhibited changes associated with the flares.These results may shed light on understanding the evolution of sunspots.We analyze sunspot rotation and magnetic transients in NOAA AR 11429 during two X-class(X5.4 and X1.3)flares using data from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory.A large leading sunspot with positive magnetic polarity rotated counterclockwise.As expected,the rotation was significantly affected by the two flares.Magnetic transients induced by the flares were clearly evident in the sunspots with negative polarity.They were moving across the sunspots with speed of order 3-7 km s^(-1).Furthermore,the trend of magnetic flux evolution in these sunspots exhibited changes associated with the flares.These results may shed light on understanding the evolution of sunspots.

关 键 词：sunspots—Sun rotation—Sun magnetic fields 

分 类 号：P182[天文地球—天文学]