脉冲星风云G21.5-0.9的多波段非热辐射  

Multi-band non-thermal emission of PWN G21.5-0.9

作　　者：刘志强[1] 朱波涛[2] 方军[2] 宋庆和[1] 楼宇丽[1] 

机构地区：[1]昆明理工大学理学院,云南昆明650500 [2]云南大学天文学系,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2017年第1期58-62,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(11563009)

摘　　要：运用含时演化理论模型研究脉冲星风云G21.5-0.9的多波段非热辐射.在这个模型中,考虑2种不同成分的注入电子,低能成分电子和高能成分电子.其中低能成分电子形式为具有幂律谱,而高能成分电子形式为Maxwellian加上一个高能幂律谱.通过理论计算,发现该模型能很好地解释脉冲星风云G21.5-0.9的多波段观测数据,射电到X射线段的辐射主要通过电子同步辐射产生,而伽玛射线主要通过逆康普顿散射产生.We study the multi-band non-thermal radiation of PWN G21.5-0.9 using the spectral evolution model.In this model,two electron components are considered,i.e., a low energy electron component with a power law spectrum and a high-energy electron component with a relativistic Maxwellian plus a high-energy power law tail.We have found that the model can well explain the multi-band observation flux points of PWN G21.5-0.9; moreover,the results show that the radiation from G21.5-0.9 during the band from radio to X-ray is produced through synchrotron emission from the relativistic electrons, and the gamma-ray photons are produced via in- versed Compton scattering.

关 键 词：脉冲星 脉冲星风云 G21.5-0.9 高能辐射 

分 类 号：P142.8[天文地球—天体物理]