标题： 通过极端法拉第旋转校正带宽去极化 显示英文标题

标题： Correcting Bandwidth Depolarization by Extreme Faraday Rotation

摘要： 对射电辐射偏振的测量会受到多种去偏振效应的影响，例如带宽去偏振，这是由有限信道带宽的平均效应与法拉第旋转引起的频率依赖性偏振共同作用造成的。 关于带宽去偏振的数学处理非常少，尤其是在分析射电偏振数据的旋转量（RM）合成方法的背景下。 我们发现了一个简单的公式，可用于预测给定观测配置下带宽去偏振是否显著。 我们推导并测试了三种修改RM合成的方法，以校正带宽去偏振。 通过这些测试，我们开发了一种新算法，其检测带宽去偏振信号的信噪比高于传统的RM合成，并能恢复正确的源偏振特性（RM和偏振强度）。 我们已用LOFAR两米天空调查的真实数据验证了该算法的预期效果。 为了使该算法可供社区使用，我们将其作为新工具添加到了RM-Tools偏振分析包中。 显示英文摘要

摘要： Measurements of the polarization of radio emission are subject to a number of depolarization effects such as bandwidth depolarization, which is caused by the averaging effect of a finite channel bandwidth combined with the frequency-dependent polarization caused by Faraday rotation. There have been very few mathematical treatments of bandwidth depolarization, especially in the context of the rotation measure (RM) synthesis method for analyzing radio polarization data. We have found a simple equation for predicting if bandwidth depolarization is significant for a given observational configuration. We have derived and tested three methods of modifying RM synthesis to correct for bandwidth depolarization. From these tests we have developed a new algorithm that can detect bandwidth-depolarized signals with higher signal-to-noise than conventional RM synthesis and recover the correct source polarization properties (RM and polarized intensity). We have verified that this algorithm works as expected with real data from the LOFAR Two-metre Sky Survey. To make this algorithm available to the community, we have added it as a new tool in the RM-Tools polarization analysis package.