Temporal and Spectral Characteristics of Persistent Emission and Special Bursts of Magnetar SGR J1935+2154 Based on Insight-HXMT  

作　　者：Xue-Feng Lu Li-Ming Song Ming-Yu Ge Shuang-Nan Zhang Jin-Lu Qu Ce Cai Cong-Zhan Liu Cheng-Kui Li Yu-Cong Fu Ying-Chen Xu 

机构地区：[1]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Beijing 100049,China [2]University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100049,China [3]College of Physics and Hebei Key Laboratory of Photophysics Research and Application,Hebei Normal University,Shijiazhuang 050024,China [4]Department of Astronomy,Beijing Normal University,Beijing 100875,China

出　　处：《Research in Astronomy and Astrophysics》2024年第6期225-233,共9页天文和天体物理学研究（英文版）

基　　金：supported by International Partnership Program of Chinese Academy of Sciences(grant No.113111KYSB20190020);by the National Key R&D Program of China(2021YFA0718500)from the Minister of Science and Technology of China(MOST);supports from the National Natural Science Foundation of China under Grants U1938109,12333007,12173103,U2038101,U1938103,12333007,12303045,U1938201 and 11733009。

摘　　要：In October 2022,the magnetar SGR J1935+2154 entered the active outburst state.During the episode,the InsightHXMT satellite carried out a long observation that lasted for 20 days.More than 300 bursts were detected,and a certain amount of persistent radiation signals were also accumulated.This paper mainly introduces the results of persistent radiation profile folding and period search based on Insight-HXMT data.At the same time,the burst phase distribution characteristics,spectral lag results of burst,the spectral characteristics of zero-lag bursts and the time-resolved spectral evolution characteristics of high-flux bursts are reported.We found that there is no significant delay feature during different energy bands for the bursts of SGR J1935+2154.The observed zero-lag burst does not have a unique spectrum.The time-resolved spectrum of the individual burst has consistent spectral types and spectral parameters at different time periods of the burst.We also find that the burst number phase distribution and the burst photon phase distribution have the same tendency to concentrate in specific regions of the persistent emission profile.

关 键 词：radiation mechanisms:general dense matter magnetic fields 

分 类 号：P145.9[天文地球—天体物理]