Blazar天体射电爆发的持续注入喷流模型  

A Prolonged Injection Jet-Model for Radio Outbursts in Blazars

作　　者：钱善瑎 

机构地区：[1]中国科学院北京天文台,北京100080

出　　处：《天体物理学报》1996年第1期15-23,共9页

基　　金：国家自然科学基金

摘　　要：为了解释Blazar天体射电爆发的普遍演化特性，本文提出一个持续注入的喷流模型．假定在喷流基底上以相对论性速度持续地注入相对记等离子体（由磁场和相对论电子组成）．这一等离子体在沿喷流向外运动时经受绝热膨胀损耗．理论计算表明，射电爆发的频谱演化具有Valtaoja等人所建议的典型的3阶段演化形式.它们非常好地重现了Blazar天体中观测到的射电爆发的普遍行为．In order to interprete the general evolutional properties of radio outbursts in blazars a prolonged injection jet-model is proposed. It is assumed that relativistic plasma consisting of magnetic field and relativistic electrons is prolongedly injected with relativistic speed at the base of the jet and subjected to adiabatic expansion loss as it moves outwards along the jet axis. It is shown by the theoretical calculations that the spectral evolution of radio outbursts has the pattern of 3-stage evolution suggested by Valtaoja et al. They reproduce the general behaviour of radio outbursts observed in blazars very well.

关 键 词：河外射电爆发 BLAZAR天体 喷流模型 

分 类 号：P162[天文地球—天文学]