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

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

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In October 2022,the magnetar SGR J1935+2154 entered the active outburst state.During the episode,the Insight-HXMT 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.

radiation mechanisms:generaldense mattermagnetic fields

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

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Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Beijing 100049,China

University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100049,China

College of Physics and Hebei Key Laboratory of Photophysics Research and Application,Hebei Normal University,Shijiazhuang 050024,China

Department of Astronomy,Beijing Normal University,Beijing 100875,China

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International Partnership Program of Chinese Academy of SciencesNational Key R&D Program of ChinaNational Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

113111KYSB201900202021YFA0718500from the Minister of ScienceTechnology of ChinaMOSTU19381091233300712173103U2038101U19381031233300712303045U193820111733009

2024

10.1088/1674-4527/ad4599

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(6)