Quantifying the memory and dynamical stability of magnetar bursts  

作　　者：Yu Sang Hai-Nan Lin 桑语;林海南(Center for Gravitation and Cosmology,College of Physical Science and Technology,Yangzhou University,Yangzhou 225009,China;Department of Physics,Chongqing University,Chongqing 401331,China;Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 401331,China)

机构地区：[1]Center for Gravitation and Cosmology,College of Physical Science and Technology,Yangzhou University,Yangzhou 225009,China [2]Department of Physics,Chongqing University,Chongqing 401331,China [3]Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 401331,China

出　　处：《Chinese Physics C》2025年第3期189-196,共8页中国物理C(英文版)

基　　金：Supported by the National Natural Science Fund of China(12005184,12175192,12275034,12347101);the Fundamental Research Funds for the Central Universities of China(2024CDJXY-022)。

摘　　要：The time series of energy and waiting time in magnetar bursts carry important information about the source activity.In this study,we investigate the memory and dynamical stability of magnetar bursts from four soft gamma repeater(SGR)sources:SGR 1806−20,SGR 1900+14,SGR J1935+2154,and SGR J1550−5418.Based on the rescaled range analysis,we quantify the memory in magnetar bursts for the first time and find that there exists long-term memory in the time series of both waiting time and energy.We investigate the dynamical stability in the context of randomness and chaos.For all four SGR samples,we find that the waiting time is not completely random;however,the energy of two SGRs is consistent with a total random organization.Furthermore,both waiting time and energy exhibit weak chaos.We also find no significant difference between SGRs and repeating fast radio bursts(FRBs)in the randomness-chaos phase space.The statistical similarity between SGRs and repeating FRBs hints that there may be potential physical connection between these two phenomena.

关 键 词：soft gamma repeaters fast radio bursts RANDOMNESS CHAOS 

分 类 号：P14[天文地球—天体物理]