MHD waves at a spherical interface modelling EIT waves

Details MHD waves at a spherical interface modelling EIT waves MHD waves at a spherical interface modelling EIT waves

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007an....328..769d&link_type=abstract

Astronomische Nachrichten, Vol.328, Issue 8, p.769

Astronomy and Astrophysics

Astronomy

2

Magnetohydrodynamics (Mhd), Sun: Atmosphere, Sun: Corona, Waves

Scientific paper

Eruptive events such as flares and coronal mass ejections (CMEs) are known to generate global waves propagating over distances comparable to the solar radius in different layers of the solar atmosphere. Here we investigate the propagation of coronal EIT waves, modelled as fast magnetoacoustic modes propagating at a spherical interface in the presence of a purely radial magnetic field. Based on a simplified equilibrium we derive the dispersion relation of the waves. The generation and propagation of EIT waves at the spherical interface is studied numerically for different values of spherical degree and preliminary conclusions are reached regarding the properties of EIT waves.

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