Statistical Properties of X-Ray Bursts from SGR J1935+2154 Detected by Insight-HXMT  

作　　者：Wen-Long Zhang Xiu-Juan Li Yu-Peng Yang Shuang-Xi Yi Cheng-Kui Li Qing-Wen Tang Ying Qin Fa-Yin Wang 

机构地区：[1]School of Physics and Physical Engineering,Qufu Normal University,Qufu 273165,China [2]School of Cyber Science and Engineering,Qufu Normal University,Qufu 273165,China [3]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [4]Department of Physics,School of Physics and Materials Science,Nanchang University,Nanchang 330031,China [5]Department of Physics,Anhui Normal University,Wuhu 241000,China [6]School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China

出　　处：《Research in Astronomy and Astrophysics》2023年第11期112-117,共6页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Program of China(2021YFA0718500);the National Natural Science Foundation of China under grants U2038106 and 12065017;partially by the Jiangxi Provincial Natural Science Foundation under grant 20224ACB211001。

摘　　要：As one class of the most important objects in the universe,magnetars can produce a lot of different frequency bursts including X-ray bursts.In Cai et al.,75 X-ray bursts produced by magnetar SGR J1935+2154 during an active period in 2020 are published,including the duration and net photon counts of each burst,and waiting time based on the trigger time difference.In this paper,we utilize the power-law model,dN(x)/dx∝(x+x_0)~((-α)_x),to fit the cumulative distributions of these parameters.It can be found that all the cumulative distributions can be well fitted,which can be interpreted by a self-organizing criticality theory.Furthermore,we check whether this phenomenon still exists in different energy bands and find that there is no obvious evolution.These findings further confirm that the X-ray bursts from magnetars are likely to be generated by some self-organizing critical process,which can be explained by a possible magnetic reconnection scenario in magnetars.

关 键 词：stars:magnetars X-rays:bursts magnetic reconnection 

分 类 号：P172.2[天文地球—天文学]