JVAS/CLASS平谱射电源的极化：II。对准无线电极化的搜索
The polarization in the JVAS/CLASS flat-spectrum radio sources: II. A search for aligned radio polarizations
摘要：
我们已经使用了非常大的JVAS/CLASS 8.4 GHz平谱射电源的调查，以测试的假设，有一个系统的极化位置角矢量的宇宙尺度上的Hutsemekers等人（2005）声称的类型对齐。对4290个偏振通量密度>=1 mJ·y的源的偏振位置角进行了检验。无论是作为一个整体，还是当分成高红移（z >= 1.24）和低红移的子样本时，它们都没有揭示出大规模的排列。Hutsemekers et al（2005）所涵盖的特定区域内的射电源也不存在。显示任何显著效果。我们还研究了从VLBI观测中得到的秒差距尺度喷流的位置角，再次发现没有证据表明它们是系统排列的。最后，我们研究了偏振位置角与秒差距尺度喷流偏振位置角之间的相关性。正如预期的那样，我们发现有一个倾向的偏振角是垂直的喷流角。然而，喷流和偏振位置角的差异在天空的不同部分并没有显示出任何系统性的趋势。
英文摘要：
We have used the very large JVAS/CLASS 8.4-GHz surveys of flat-spectrum radio sources to test the hypothesis that there is a systematic alignment of polarization position angle vectors on cosmological scales of the type claimed by Hutsemekers et al (2005). The polarization position angles of 4290 sources with polarized flux density >=1 mJy have been examined. They do not reveal large-scale alignments either as a whole or when split in half into high-redshift (z >= 1.24) and low-redshift sub-samples. Nor do the radio sources which lie in the specific areas covered by Hutsemekers et al (2005). show any significant effect. We have also looked at the position angles of parsec-scale jets derived from VLBI observations and again find no evidence for systematic alignments. Finally, we have investigated the correlation between the polarization position angle and those of the parsec-scale jets. As expected, we find that there is a tendency for the polarization angles to be perpendicular to the jet angles. However, the difference in jet and polarization position angles does not show any systematic trend in different parts of the sky.
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