标题： MeerKAT第十四篇：关于高线偏振脉冲星信号的研究 显示英文标题

标题： The Thousand-Pulsar-Array programme on MeerKAT XIV: On the high linearly polarized pulsar signals

摘要： 许多脉冲星观测到的线性偏振位置角（PPA）的S型摆动可以通过旋转矢量模型（RVM）来解释。 然而，在作为千脉冲阵列（TPA）计划一部分使用 MeerKAT望远镜观测的大样本脉冲星中尝试拟合RVM的努力，只有一半的案例取得了成功。 高时间分辨率的研究表明，失败的案例是由于存在正交偏振模式，或者PPA点分布高度无序。 一个这样的例子是 PSR J1645-0317。 最近有研究表明，通过仅使用大于80%线性极化的采样时间，可以在该脉冲星中恢复RVM。 在这项工作中，我们测试了这种新方法，选取了TPA样本中最亮的249个脉冲星，其中177个提供了足够的高度极化样本以适应我们的方法。 令人惊讶的是，现在只有这249颗脉冲星中的9颗（5%）无法拟合RVM，而原始分析中有59%失败。 这一结果支持了潜在机制是相干曲率辐射的范式。 显示英文摘要

摘要： The S-shaped swing of the linear polarization position angle (PPA) observed in many pulsars can be interpreted by the rotating vector model (RVM). However, efforts to fit the RVM for a large sample of pulsars observed with the MeerKAT telescope as a part of the Thousand-Pulsar-Array (TPA) programme, only succeeded for about half the cases. High time-resolution studies suggest that the failed cases arise due to the presence of orthogonal polarization modes, or highly disordered distribution of PPA points. One such example is PSR~J1645-0317. Recently it has been shown that the RVM can be recovered in this pulsar by using only time samples which are greater than 80% linearly polarized. In this work we test this novel approach on the brightest 249 pulsars from the TPA sample, of which 177 yield sufficient highly polarized samples to be amenable to our method. Remarkably, only 9 of these pulsars (5%) now fail to fit the RVM as opposed to 59% from the original analysis. This result favours the paradigm that the underlying mechanism is coherent curvature radiation.