Radio loudness and classification for radio source

The extragalactic radio sources are divided into two subclasses (radio-loud and radio-quiet sources) in the literature using radio loudness (R), which is defined as the ratio of...现有文献中，河外射电源基于射电亮度（radio loudness, R）被划分为两个子类，即射电强源（radio-loud sources）与射电宁静源（radio-quiet sources），其中射电亮度被定义为……