caa a22 4500 445346256 CHVBK 20180317142829.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s11207-011-9771-0 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9771-0 Reflection and Ducting of Gravity Waves Inside the Sun [Elektronische Daten] [K. MacGregor, T. Rogers] Internal gravity waves excited by overshoot at the bottom of the convection zone can be influenced by rotation and by the strong toroidal magnetic field that is likely to be present in the solar tachocline. Using a simple Cartesian model, we show how waves with a vertical component of propagation can be reflected when traveling through a layer containing a horizontal magnetic field with a strength that varies with depth. This interaction can prevent a portion of the downward traveling wave energy flux from reaching the deep solar interior. If a highly reflecting magnetized layer is located some distance below the convection zone base, a duct or wave guide can be set up, wherein vertical propagation is restricted by successive reflections at the upper and lower boundaries. The presence of both upward and downward traveling disturbances inside the duct leads to the existence of a set of horizontally propagating modes that have significantly enhanced amplitudes. We point out that the helical structure of these waves makes them capable of generating an α-effect, and briefly consider the possibility that propagation in a shear of sufficient strength could lead to instability, the result of wave growth due to over-reflection. Springer Science+Business Media B.V., 2011 Solar interior nationallicence Solar magnetic field nationallicence Magnetohydrodynamics nationallicence Internal gravity waves nationallicence MacGregor K. High Altitude Observatory, National Center for Atmospheric Research, 3080 Center Green, 80301, Boulder, CO, USA aut Rogers T. Department of Planetary Sciences, University of Arizona, 85721, Tucson, AZ, USA aut Solar Physics Springer Netherlands 270/2(2011-06-01), 417-436 0038-0938 270:2<417 2011 270 11207 https://doi.org/10.1007/s11207-011-9771-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9771-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MacGregor K. High Altitude Observatory, National Center for Atmospheric Research, 3080 Center Green, 80301, Boulder, CO, USA aut NATIONALLICENCE 700 1- Rogers T. Department of Planetary Sciences, University of Arizona, 85721, Tucson, AZ, USA aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 270/2(2011-06-01), 417-436 0038-0938 270:2<417 2011 270 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer