摘要
研究表明,耀发的能谱延迟与耀发特性参数(峰值时间、宽度、上升时间和衰减时间)有较强的相关性,随着时间的推移,耀发变宽,能谱延迟变大。使用离散相关函数(Discrete Correlation Function,DCF)对一个具有10个耀发的多耀发伽马暴(GRB 051117A)进行能谱延迟研究发现,在GRB 051117A内,能谱延迟与耀发的峰值时间、宽度、上升时间、衰减时间存在较强的相关性,即lag∝t_( peak),w,t_( rise),t _(decay)。在伽马暴内部耀发也随时间演化,即随着时间的推移,耀发的宽度越宽,能谱延迟越大。将伽马暴之间存在的能谱延迟与耀发特性参数的关系拓展到伽马暴内部,可以帮助我们对多耀发伽马暴有更深的理解。GRB 051117A内部的耀发特性参数之间存在的相关关系与多个伽马暴之间甚至是瞬时辐射脉冲高度相似,这也为X射线耀发与瞬时辐射脉冲可能是同一物理起源提供支持。
Researches show thatthere is a strong correlation between the spectral lag of flare and flare characteristic parameters(peak time,width,rise time,decay time),as time goes on,the flare becomes wider and the spectral lag becomes larger.We use the discrete-correlation function(DCF)to study the spectral lag of a multi-flare GRB(GRB 051117A)with 10 flares,it is found that within GRB 051117A,the spectral lag is also strongly correlated with the peak time,width,rise time and decay time of the flares.this is,lag∝t_( peak),ω,t_( rise),t _(decay).The flares will also evolve over time within a GRB.This work extends the relationship between the spectral lag between GRBs and the characteristic parameters of flares to the interior of GRBs,which can help us have a deeper understanding of multi-flare GRBs.Moreover,the correlation between the flare characteristic parameters within GRB 051117A is highly similar to that between multiple GRBs and even prompt emission pulses.This also supports that X-ray flares and prompt emission pulses may have the same physical origin.
作者
常学钊
彭朝阳
王道周
陈家明
Chang Xuezhao;Peng Zhaoyang;Wang Daozhou;Chen Jiaming(College of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China)
出处
《天文研究与技术》
CSCD
2021年第4期427-436,共10页
Astronomical Research & Technology
基金
国家自然科学基金(11763009)资助.
