Quantifying the memory and dynamical stability of magnetar bursts

被引：0

作者：

Sang, Yu ^{[1
]}

Lin, Hai-Nan ^{[2
,3
]}

机构：

[1] Yangzhou Univ, Coll Phys Sci & Technol, Ctr Gravitat & Cosmol, Yangzhou 225009, Peoples R China

[2] Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China

[3] Chongqing Univ, Chongqing Key Lab Strongly Coupled Phys, Chongqing 401331, Peoples R China

来源：

CHINESE PHYSICS C | 2025年 / 49卷 / 03期

关键词：

soft gamma repeaters; fast radio bursts; randomness; chaos; SOFT GAMMA-REPEATERS; SELF-ORGANIZED CRITICALITY; LONG-RANGE DEPENDENCE; FAST RADIO-BURSTS; APPROXIMATE ENTROPY; LYAPUNOV EXPONENTS; RAY REPEATERS; NEUTRON-STARS; EMISSION; RANDOMNESS;

D O I：

10.1088/1674-1137/ad9d1c

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

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.

引用

页数：8

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