计算了2个河外射电源样本的核主导系数,并研究了核主导系数与核及延展元的流量密度的关系.结果显示:当核主导系数较小时,核主导系数与核流量密度线性相关;当核主导系数较大时,核流量密度与核主导系数没有相关,而与延展元流量有线性相关.因此,2个样本的这些关系依赖于流量密度与核主导系数,利用相对论喷流模型能解释用2个样本所得到的相关结果.%The core-dominance parameter is calculated and investigated for the correlation with the core/extended flux density for two samples. But the two samples show different dependence of flux density on the core dominance parameter.Based on the relativistic beaming model, a relation between core-dominance parameter and the core/extended flux density is derived for extragalactic radio sources. The relations show that the core flux density is linearly correlated with the core-dominance parameter while the extended flux density is not correlated with core-dominance parameter when the core-dominance is lower than unity, and that the core flux density is not correlated with the core-dominance parameter while the extended flux density is linearly correlated with core-dominance parameter when the core-dominance is higher than unity. The relation obtained here can explain the different result obtained from two samples.
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