Evidence of a two-component jet in the afterglow of GRB 070419A

作     者：ZHENG WeiKang1,2 & DENG JinSong1 1 National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China 2 Graduate University of Chinese Academy of Science,Beijing 100049,China 

作者机构：National Astronomical Observatories Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Science Beijing China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2010年第53卷第S1期

页      面：265-266页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China (Grant No. 2009CB824800) the National Natural Science Foundation of China (Grant Nos. 10673014 and 10873017) 

主　　题：gamma-rays:bursts gamma-rays:observations 

摘      要：A two-component jet model is proposed to explain the unusual afterglow of GRB *** the optical light curve,a wide jet with an opening angle of 30-40 degrees is assumed to produce the late shallow decay,while the three early power-law segments must be caused by a narrow jet with an opening angle of-2-4 *** energy injections to both components are *** X-ray emission may come from either the wide jet or the narrow *** the latter is correct,the jets may run into an ISM environment and the temporal index of the late energy injection may be q-0.65.