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arXiv 1503.03482astro-ph.CO
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射电类星体在JVAS/CLASS巡天中的极化排列

Polarization alignments of radio quasars in JVAS/CLASS surveys

Vincent Pelgrims, Damien Hutsemékers

摘要:

我们测试的假设,平谱无线电源(FSRS)在JVAS/CLASS 8.4 GHz的调查是随机取向的天空中的极化矢量。具有鲁棒偏振测量的样品由$4155$对象制成,并且已知其中$1531$的红移信息。我们进行了两个统计分析:一个是二维的,另一个是三维的,当距离可用时。我们发现显着的大规模的样品中只包含类星体(类星体)的FSRS的品种之间的偏振矢量对齐。虽然这些相关性很难用物理效应或数据集中的偏差来解释,但在以前发现光学偏振对准的天空区域中发现具有显著对准偏振矢量的类星体的事实是惊人的。

英文摘要:

We test the hypothesis that the polarization vectors of flat-spectrum radio sources (FSRS) in the JVAS/CLASS 8.4-GHz surveys are randomly oriented on the sky. The sample with robust polarization measurements is made of $4155$ objects and redshift information is known for $1531$ of them. We performed two statistical analyses: one in two dimensions and the other in three dimensions when distance is available. We find significant large-scale alignments of polarization vectors for samples containing only quasars (QSO) among the varieties of FSRS's. While these correlations prove difficult to explain either by a physical effect or by biases in the dataset, the fact that the QSO's which have significantly aligned polarization vectors are found in regions of the sky where optical polarization alignments were previously found is striking.

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