MHD Waves in the Neighbourhood of a 2D X-Type Neutral Point
Abstract
A linear, fast magnetoacoustic wave is generated at a boundary and travels towards an magnetic X-type neutral point. Due to refraction, the wave wraps itself around the null point, causing a large current to accumulate there. Simulations show that the current build up is exponential in time. The numerical simulations are in good agreement with analytic work based on a WKB solution obtained by the method of characteristics.
- Publication:
-
SOHO 13 Waves, Oscillations and Small-Scale Transients Events in the Solar Atmosphere: Joint View from SOHO and TRACE
- Pub Date:
- January 2004
- Bibcode:
- 2004ESASP.547..537M
- Keywords:
-
- Sun;
- Refraction;
- Magnetoacoustic waves