Proceedings of the International Astronomical Union

Contributed Papers

Coronal global EIT waves as tools for multiple diagnostics

I. Ballaia1 and M. Douglasa1

a1 SP2RC, Department of Applied Mathematics, University of Sheffield, Sheffield S3 7RH, UK email: i.ballai@sheffield.ac.uk; mark.douglas@sheffield.ac.uk

Abstract

Observations in EUV lines of the solar corona revealed large scale propagating waves generated by eruptive events able to travel across the solar disk for large distances. In the low corona, CMEs are known to generate, e.g. EIT waves which can be used to sample the coronal local and global magnetic field. This contribution presents theoretical models for finding values of magnetic field in the quiet Sun and coronal loops based on the interaction of global waves and local coronal loops as well as results on the generation and propagation of EIT waves. The physical connection between local and global solar coronal events (e.g. flares, EIT waves and coronal loop oscillations) will also be explored.

Keywords

  • Sun: corona;
  • Sun: magnetic fields;
  • Sun: coronal mass ejections (CMEs) waves