论文标题
使用第一目录的射电轴对齐
Alignment of Radio Galaxy Axes using FIRST Catalogue
论文作者
论文摘要
我们使用第一个目录研究射电星系轴的对准。我们进行了几次削减，以便选择最有可能没有系统偏见的候选人。在我们的研究中，我们主要专注于测试一定角度分离中源之间对齐的一致性，因为对于大多数来源，红移信息都不可用。我们发现对小于1度的角度距离产生非常明显的影响。假设这些来源主要在红移为0.8时，则发现对齐的距离标度大约为28 mpc，这与较早的估计值一致。但是，我们无法完全排除数据中系统偏见的可能性。我们还使用较小的数据样本进行了完整的三维分析，可为红移提供可用的信息。在这种情况下，我们只在更大的距离下发现一个非常弱的信号。
We study the alignment of radio galaxies axes using the FIRST catalogue. we impose several cuts in order to select the candidates which are most likely to be free of systematic bias. In our study we primarily focus on testing for alignment among sources within a certain angular separation from one another since for most sources redshift information is not available. We find a very significant effect for angular distances less than 1 degrees. The distance scale of alignment is found to be roughly 28 Mpc, in agreement with earlier estimates, assuming that these sources are dominantly at redshift of 0.8. However we are not able to entirely rule out the possibility of systematic bias in data. We also perform a full three dimensional analysis using a smaller data sample for which redshift information is available. In this case we only find a very weak signal at much larger distances.
