视超光速源中3C454.3的特殊性

本文从简要总结迄今所发现的视超光速源开始。介绍近年来探测到的视超光速源之一——类星体3C 454.3的VLBI多频段,多历元观测及其主要结果。采用列表对比方式表明此源相对其他视超光速源的一般特征呈现的特殊性。最后对此特殊的视超光速源的可能解释作初步讨论。 本文可以看作是对3C453.3观测已有报导12]和13]的进一步补充。

Peculiarities of 3C 454.3 Among the Superluminal Sources

The superluminal sources discovered so far are summarized briefly at the beginning of this paper. The multi-frequency and multi-epoch VLBI observations of a quasar 3C 454.3 and their results are introduced. The quasar is one of the superluminal sources revealed recently and probably a new kind of superluminal source.The peculiarities of 3C 454.3 in contrast to the general characters of other superluminals are shown by making a list of comparison. Several possible explanations of the complex behaviour of the source are discussed tentatively in the last part of the paper.The paper could be considered as a supplement to the two references 12] and 13] reported concerning the observations of 3C 454.3 in the last several years.