Probing magnetic fields in astrophysical environments is both important and challenging. The Gradient Technique (GT) is a new tool for tracing magnetic fields, rooted in the properties of magnetohydrodynamic (MHD) turbulence and turbulent magnetic reconnection. In this work, we examine the performance of GT when applied to synthetic synchrotron emission and spectroscopic data obtained from sub-Alfvénic and trans-Alfvénic MHD simulations. We demonstrate the improved accuracy of GT in tracing magnetic fields in the absence of low spatial frequencies. Additionally, we apply a low-spatial-frequency filter to a diffuse neutral hydrogen region selected from the GALFA-H i survey. Our results show an increased alignment between the magnetic fields inferred from GT and the Planck 353 GHz polarization measurements.

中文翻译：

---

使用梯度技术追踪磁场：空间滤波效应和干涉仪的使用


探测天体物理环境中的磁场既重要又具有挑战性。梯度技术 (GT) 是一种追踪磁场的新工具，植根于磁流体动力学 (MHD) 湍流和湍流磁重联的特性。在这项工作中，我们研究了 GT 应用于合成同步加速器发射和从亚阿尔夫尼克和跨阿尔夫尼克 MHD 模拟获得的光谱数据时的性能。我们证明了 GT 在缺乏低空间频率的情况下追踪磁场的准确性得到了提高。此外，我们对从 GALFA-H i 调查中选择的扩散中性氢区域应用了低空间频率滤波器。我们的结果显示 GT 推断的磁场与 Planck 353 GHz 极化测量之间的一致性增强。