【摘要】 本文对河外射电变源和致密源的观测特征以及理论模型进行了评述。本文分为两部分。第一部分包括仪器及观测方法、样品选择及资料分析,射电源的频谱特征和时变性质等。 本文的第二部分简述了理论研究和模型工作。其中包括对于在河外射电源中观测到的射电频谱及视超光速运动等现象的理论解释。和其它模型比较起来,Rees模型比较好,它可以很好地解释观测特性。更多还原

【Abstract】 Observational properties of extragalactic variable and compact radio sources and theoretical models have been reviewed in this paper which could be divided into two parts. The first part includes instrumentations and observational methods, sample selecting and data analysis, properties of radio spectrum and variabilities of radio sources, etc.The theoretical studies and models are summarized in the second part which includes the explanation of radio spectrum and superluminal motions observed in the extragalactic radio sources. Rees model of superluminal motion seems to be reasonable one which explains the observational properties better than others.更多还原