A New Look at Mode Conversion in a Stratified Isothermal Atmosphere

Simple item page
dc.creatorMcDougall, A. M. D.
dc.creatorHood, A. W.
dc.date2007-07-05
dc.date.accessioned2026-07-07T09:53:50Z
dc.date.available2026-07-07T09:53:50Z
dc.descriptionRecent numerical investigations of wave propagation near coronal magnetic null points (McLaughlin and Hood: Astron. Astrophys. 459, 641,2006) have indicated how a fast MHD wave partially converts into a slow MHD wave as the disturbance passes from a low-beta plasma to a high-beta plasma. This is a complex process and a clear understanding of the conversion mechanism requires the detailed investigation of a simpler model. An investigation of mode conversion in a stratified, isothermal atmosphere, with a uniform, vertical magnetic field is carried out, both numerically and analytically. In contrast to previous investigations of upward-propagating waves (Zhugzhda and Dzhalilov: Astron. Astrophys. 112, 16, 1982a; Cally: Astrophys. J. 548, 473, 2001), this paper studies the downward propagation of waves from a low-beta to high-beta environment. A simple expression for the amplitude of the transmitted wave is compared with the numerical solution.
dc.description14 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0707.0830
dc.identifierhttp://arxiv.org/abs/0707.0830
dc.identifierSolar Phys. 246, 259-271 (2007)
dc.identifierdoi:10.1007/s11207-007-0393-5
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/166097
dc.subjectAstrophysics
dc.titleA New Look at Mode Conversion in a Stratified Isothermal Atmosphere
dc.typetext

Files

Collections

arXiv