Modeling multiband emissions from two young SNRs with a time-dependent magnetic field  

作　　者：Yun-Yong Tang Zu-Cheng Dai Li Zhang 

机构地区：[1]Department of Physical Science and Technology, Kunming University [2]Department of Physics, Yunnan University

出　　处：《Research in Astronomy and Astrophysics》2013年第5期537-546,共10页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11173020);the National Basic Research Program of China(973Program,2009CB824800)

摘　　要：The nonthermal components in hard X-rays have been detected in two young supernova remnants （SNRs）： SN 1006 and Kepler＇s SNR. Various theoretical models showed that the amplification of the magnetic field was crucial to explain their multiband emission properties. We investigate the evolution of the magnetic field and model the multiband emissions from these two young SNRs with a time-dependent injection model. The results indicate that （1） the radio and X-ray emissions are re- produced by synchrotron radiation of the injected electrons, while the y-rays can be explained as inverse Compton scattering of the relativistic electrons and proton-proton interaction of the high-energy protons; and （2） the amplification of the magnetic field spontaneously happens with reasonable parameters.The nonthermal components in hard X-rays have been detected in two young supernova remnants （SNRs）： SN 1006 and Kepler＇s SNR. Various theoretical models showed that the amplification of the magnetic field was crucial to explain their multiband emission properties. We investigate the evolution of the magnetic field and model the multiband emissions from these two young SNRs with a time-dependent injection model. The results indicate that （1） the radio and X-ray emissions are re- produced by synchrotron radiation of the injected electrons, while the y-rays can be explained as inverse Compton scattering of the relativistic electrons and proton-proton interaction of the high-energy protons; and （2） the amplification of the magnetic field spontaneously happens with reasonable parameters.

关 键 词：Key words： radiation mechanisms： non-thermal -- gamma-rays： theory -- （ISM：）supernova remnant 

分 类 号：P145.3[天文地球—天体物理]