An Exact Test of Generalized Ray Theory in Local Helioseismology
Shelley C. Hansen, Paul S. Cally
TL;DR
This paper evaluates the accuracy of Generalized Ray Theory in modeling magnetohydrodynamic wave transmission and conversion in solar active regions, confirming its effectiveness through comparison with exact solutions in a simplified model.
Contribution
It provides the first validation of GRT against exact solutions in a 2D, isothermal, stratified model with inclined magnetic fields.
Findings
GRT performs very well in the tested model.
GRT accurately describes MHD mode transmission and conversion.
Validation supports GRT's application to solar active regions.
Abstract
Generalized Ray Theory (GRT) provides a simple description of MHD mode transmission and conversion between magnetoacoustic fast and slow waves and is directly applicable to solar active regions. Here it is tested in a simple two-dimensional, isothermal, gravitationally-stratified model with inclined magnetic field using previously published exact solutions and found to perform very well.
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Taxonomy
TopicsSolar and Space Plasma Dynamics · Geomagnetism and Paleomagnetism Studies · Geophysics and Gravity Measurements