中文摘要：

给出了一个含57个河外射电源样本,计算了其在6 cm波段的核主导系,以及各源总辐射、核辐射及延展元辐射的谱指数.分析了这些谱指数之间的相互关系,对所得结果用一个两部分辐射相对论喷流模型给出了合理的解释.

英文摘要：

The total （ατ）, core αc and extended （αE） spectral indices and core-dominance parameter （R） at 6 cm were calculated for a sample of 57 extragalactic radio sources. The correlations between R and ατ and αc, and the mutual correlations between αr, αc and αE were investigated and explained using a two-component relativistic beaming model.