Resonant acoustic waves in a stratified atmosphere

Details Resonant acoustic waves in a stratified atmosphere Resonant acoustic waves in a stratified atmosphere

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..247...86t&link_type=abstract

Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology, Proceedings of the International Astronomical Unio

Astronomy and Astrophysics

Astronomy

Waves, Hydrodynamics, Sun: Atmosphere, Sun: Photosphere, Sun: Chromosphere, Sun: Corona, Sun: Oscillations

Scientific paper

The upward propagation of linear acoustic waves in a gravitationally stratified atmosphere is studied. The wave motion is governed by the Klein-Gordon equation which contains a cut-off frequency introduced by stratification. The acoustic cut-off may act as a potential barrier when the temperature decreases with height. It is shown that waves trapped below the barrier could be subject to a resonance which extends into the entire unbounded atmosphere. The parameter space characterizing the resonance is explored.

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