Study of the brightness and polarization structure of extragalactic radio sources
Study of the brightness and polarization structure of extragalactic radio sources
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河外射电源的亮度和偏振结构研究
DOI：
10.1086/111779
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
C. J. Grebenkemper
中科院分区：
文献类型：
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作者：
M. Stull;K. Price;L. Daddario;S. J. Wernecke;W. Graf;C. J. Grebenkemper
在10.7GHz频率上测量了19个河外扩展射电源的亮度和线偏振结构。自吸收光谱与关联星系核一致的致密成分相当常见，而许多源显示高百分比偏振区域，有时大于40%。我们的研究结果与其他研究相比，都在较低的频率（一般不超过5 GHz），产生的光谱，去极化率，和法拉第旋转的偏振平面在各个源区域的信息。至少有四种不同类型的河外射电源被确定。这些类形成一个序列沿着的突出性的紧凑的中心组件相对于扩展的外部区域下降，而这些外部区域变得更加有序的结构，并承担特定的偏振特性。这表明，这个序列实际上是一个进化序列。
The brightness and linear-polarization structure of 19 extended extragalactic radio sources are determined at a frequency of 10.7 GHz. Compact components with self-absorption spectra coincident with the nucleus of an associated galaxy are fairly common, while many sources display regions of high-percentage polarization, sometimes greater than 40%. Comparison of our results with other studies, all at lower frequencies (generally not exceeding 5 GHz), has yielded information on spectra, depolarization rates, and Faraday rotation of the polarization plane in various source regions. At least four distinct classes of extragalactic radio sources are identified. These classes form a sequence along which the prominence of the compact central component declines relative to that of the extended outer regions, while those outer regions become more ordered in their structure and assume specific polarization characteristics. It is suggested that this sequence is in fact an evolutionary sequence.