单峰结构的GRB光变曲线的FWHM与E_p之间的关系  

Relationship between FWHM and E_p of single peaked GRB light curves

作　　者：邓家干[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2010年第2期363-366,共4页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(10662002)

摘　　要：探讨了观测有红移数据并具有单峰结构的伽玛射线暴(GRB)光变曲线的半高全宽(FWHM)与其光子峰值能量Ep之间的关系。用CGRO卫星与Swift观测到的具有单峰结构的并能被半经验公式——KRL模型所拟合,而且在BeppoSAX卫星、Swift和观测站观测有红移数据的25个FWHM数据与相对应的Ep进行相关分析。结果表明:单峰GRB光变曲线的FWHM与光子峰值能量Ep的对数值之间有很好的线性相关性,相关系数R=-0.77。这表明GRB的光变曲线结构与其峰值能量有密切的关系,光变曲线的FWHM越宽,则峰值能量越低。The relation between FWHMs （full-width at half-maximum） of single pulses in a sample of GRB （Gamma-ray burst） light curves and the corresponding peak energy Ep of these GRBs were explored. With a sample of 25 single-pulse GRBs with redshift measurement and fitted with Kocevs- ki, Ryde ＆ Liang model from CGRO and Swift satellite data, a correlation of the pulses FWHMs and the peak energy Ep was detected. The result showed that there does exist a proportional correlation between the logarithm of FWHMs and the logarithm of peak energy Ep with a correlation coefficient R = -0.77. It is shown that the light curve structure was correlated to the GRBs peak energy, the larger FWHM, the lower peak energy.

关 键 词：伽玛射线暴(GRB) 光变曲线 峰值能量 相关分析 

分 类 号：P14[天文地球—天体物理] P172.3[天文地球—天文学]