A POSSIBLE EXPLANATION OF ENERGY DEPENDENCE OF GRB PULSE WIDTH

作     者：XIAO-HONG ZHAO ZHAO-YANG PENG 

作者机构：National Astronomical Observatories/Yunnan Observatory Chinese Academy of Sciences P. O. Box 110 Kunming 650011 China Key Laboratory for the Structure and Evolution of Celestial Bodies Chinese Academy of Sciences P.O. Box 110 650011 Kunming China Department of Physics Yunnan Normal University Kunming 650092 China 

出 版 物：《International Journal of Modern Physics: Conference Series》 

年 卷 期：2013年第ijmpcs卷第23期

页      面：301-303页

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Gamma rays bursts 

摘      要：Previous studies have found that the width of gamma-ray burst (GRB) pulse is energy dependent 1-2 and its origin keeps unknown. Here we find combining the curvature effect and the intrinsic Band spectrum could naturally result in the energy dependence of GRB pulse width. Our result suggests that the GRB decay phase is indeed related to the so-called curvature effect. A natural expectation of our study is for bursts with single power law, not Band spectrum, pulse width will not be energy dependent in our consideration.