Constraint on the counter-jet emission in gamma-ray burst afterglows from GRB 980703  

作　　者：WANG Xin,HUANG YongFeng & KONG SiWei Department of Astronomy,Nanjing University,Nanjing 210093,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第S1期259-261,共3页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2009CB824800);the National Natural Science Foundation of China (Grant No. 10625313);the 2008 National Undergraduate Innovation Program of China (Grant No. 081028441)

摘　　要：We present a numerical investigation of emission from the receding jet of gamma-ray bursts.It is found that the peak time of the receding jet emission is significantly affected by synchrotron self-absorption in radio wavelengths.However,the receding jet component is generally very weak.It is observable mainly for those nearby events in a dense environment.Although GRB 980703 has been observed in radio wavelengths for more than 1000 days,we argue that the receding jet emission still has not been detected for this event.Actually,it is completely submerged by the host galaxy.We present a numerical investigation of emission from the receding jet of gamma-ray bursts.It is found that the peak time of the receding jet emission is significantly affected by synchrotron self-absorption in radio wavelengths.However,the receding jet component is generally very weak.It is observable mainly for those nearby events in a dense environment.Although GRB 980703 has been observed in radio wavelengths for more than 1000 days,we argue that the receding jet emission still has not been detected for this event.Actually,it is completely submerged by the host galaxy.

关 键 词：gamma rays:bursts ISM:jets and OUTFLOWS methods:numerical 

分 类 号：P172.3[天文地球—天文学]