Are "EIT Waves" Fast-Mode MHD Waves?

Abstract

We examine the nature of large-scale, coronal, propagating wave fronts (``EIT waves'') and find they are incongruous with solutions using fast-mode MHD plane-wave theory. Specifically, we consider the following properties: non-dispersive single pulse manifestions, observed velocities below the local Alfven speed, and different pulses which travel at any number of constant velocities, rather than at the ``predicted'' fast-mode speed. We discuss the possibility of a soliton-like explanation for these phenomena, and show how it is consistent with the above-mentioned aspects.

to be published in the Astrophysical Journal

Cited by in corpus (4)

• High cadence observations of a global coronal wave by EUVI/STEREO
• The Kinematics of a Globally Propagating Disturbance in the Solar Corona
• Numerical Experiments of Wave-Like Phenomena Caused by the Disruption of an Unstable Magnetic Configuration
• Turbulence-driven Polar Winds from T Tauri Stars Energized by Magnetospheric Accretion