Reflection and Conversion of Magneto-Gravity Waves in the Solar Chromosphere: Windows to the Upper Atmosphere - Astrophysics > Solar and Stellar AstrophysicsReportar como inadecuado




Reflection and Conversion of Magneto-Gravity Waves in the Solar Chromosphere: Windows to the Upper Atmosphere - Astrophysics > Solar and Stellar Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The detection of upward propagating internal gravity waves at the base of theSun-s chromosphere has recently been reported by Straus et al., who postulatedthat these may efficiently couple to Alfven waves in magnetic regions. This maybe important in transporting energy to higher levels. Here we explore thepropagation, reflection and mode conversion of linear gravity waves in a VAL Catmosphere, and find that even weak magnetic fields usually reflect gravitywaves back downward as slow magnetoacoustic waves well before they reach theAlfven-acoustic equipartition height at which mode conversion might occur.However, for certain highly inclined magnetic field orientations in which thegravity waves manage to penetrate near or through the equipartition level,there can be substantial conversion to either or both upgoing Alfven andacoustic waves. Wave energy fluxes comparable to the chromospheric radiativelosses are expected.



Autor: Marie Newington, Paul Cally

Fuente: https://arxiv.org/



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