标题： IXPE对超新星遗迹的观测 显示英文标题

标题： IXPE observations of supernova remnants

摘要： 超新星遗迹（SNRs）是天空中最重要的一种非热X射线源，并且很可能是银河宇宙射线的贡献者，同时它们也是展示成像X射线偏振探测器（IXPE）在空间分辨X射线偏振测量能力的理想目标。 首次，我们能够通过测量偏振度确定冲击波附近的磁场湍流水平（通过偏振度测量），并通过偏振方向确定磁场方向，而粒子加速就发生在这些冲击波附近。 到目前为止，IXPE报告了对四个SNRs（Cas A、Tycho、SN 1006和RX J1713.7-3946）观测的结果。 这些天体表现出广泛的特性，包括动力学年龄、发射光谱组成和起源类型。 适当地，它们在磁场特性和形态方面揭示了显著不同的结果，提供了意想不到的见解，并揭示了天体物理冲击中的粒子加速机制。 显示英文摘要

摘要： Supernova remnants (SNRs) are among the most important sources of non-thermal X-rays in the sky and likely contributors to Galactic cosmic rays and represent ideal targets to showcase the capabilities of the Imaging X-ray Polarimetry Explorer (IXPE) in performing spatially-resolved X-ray polarimetry. For the first time, we can determine the turbulence level (through the measurement of polarization degree) and the orientation (through polarization direction) of the magnetic field near the shocks, where particle acceleration occurs. IXPE reported so far the results of the observations of four SNRs: Cas A, Tycho, SN 1006 and RX J1713.7-3946. These objects exhibit a wide range of characteristics, including dynamical age, spectral composition of emission, and progenitor type. Aptly, they revealed significantly different results among them in terms of magnetic field properties and morphology, providing unexpected insights and shedding light on the particle acceleration mechanisms in astrophysical shocks.