标题： 分子云中磁场的弥散。 第二部分 显示英文标题

标题： Dispersion of Magnetic Fields in Molecular Clouds. II

摘要： 我们扩展了对分子云中偏振角弥散的研究。 我们展示了如何将信号通过云层厚度以及望远镜波束所覆盖区域的积分效应纳入分析中，以正确考虑其对测量到的角弥散和推断出的湍流与大尺度磁场强度比值的影响。 我们进一步展示了如何利用足够空间分辨率且具有足够高空间采样率的偏振数据来评估湍流磁场的相关尺度。 我们将研究结果应用于分子云OMC-1，发现其湍流相关长度约为16毫秒差距，湍流与大尺度磁场强度比值约为0.5，天空平面的大尺度磁场强度约为0.76毫高斯。 显示英文摘要

摘要： We expand our study on the dispersion of polarization angles in molecular clouds. We show how the effect of signal integration through the thickness of the cloud as well as across the area subtended by the telescope beam inherent to dust continuum measurements can be incorporated in our analysis to correctly account for its effect on the measured angular dispersion and inferred turbulent to large-scale magnetic field strength ratio. We further show how to evaluate the turbulent magnetic field correlation scale from polarization data of sufficient spatial resolution and high enough spatial sampling rate. We apply our results to the molecular cloud OMC-1, where we find a turbulent correlation length of approximately 16 mpc, a turbulent to large-scale magnetic field strength ratio of approximately 0.5, and a plane-of-the-sky large-scale magnetic field strength of approximately 0.76 mG.