Title: EIT waves and coronal magnetic field diagnostics Show Chinese title

Title: EIT波和日冕磁场诊断

Abstract: Magnetic field in the solar lower atmosphere can be measured by the use of the Zeeman and Hanle effects. In contrast, the coronal magnetic field well above the solar surface, which directly controls various eruptive phenomena, can not be precisely measureed with the traditional techniques. Several attempts are being made to probe the coronal magnetic field, such as force-free extrapolation based on the photospheric magnetograms, gyroresonance radio emissions, and coronal seismology based on MHD waves in the corona. Compared to the waves trapped in the localized coronal loops, EIT waves are the only global-scale wave phenomenon, and thus are the ideal tool for the coronal global seismology. In this paper, we review the observations and modelings of EIT waves, and illustrate how they can be applied to probe the global magnetic field in the corona. Show Chinese abstract

Abstract: 太阳低层大气中的磁场可以通过塞曼效应和汉勒效应进行测量。 相反，位于太阳表面之上的日冕磁场，直接控制着各种爆发现象，但传统的技术无法对其进行精确测量。 正在尝试多种方法来探测日冕磁场，例如基于光球磁图的无力外推法、回旋共振射电辐射，以及基于日冕中磁流体动力学波的日冕地震学。 与局限于日冕环中的波相比，EIT波是唯一的全球尺度波现象，因此是日冕全球地震学的理想工具。 在本文中，我们回顾了EIT波的观测和建模，并说明它们如何用于探测日冕中的全局磁场。