Phases and amplitudes of acoustic-gravity waves. I - Upward and downward solutions
Abstract
A study is presented of the phases and amplitudes of acoustic-gravity waves in the kx-omega diagram. Waves which propagate energy both upward and downward in the solar atmosphere are considered. The wave model considers linear perturbations in a compressible medium assumed to be a perfect gas stably stratified at uniform temperature and radiatively damped. The kx-omega diagrams are also displayed for the temperature and pressure amplitudes relative to velocity. The results from the model are discussed and compared with recent observations of the phase relations between velocity and brightness oscillations.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 1991
- Bibcode:
- 1991A&A...242..271M
- Keywords:
-
- Gravity Waves;
- Lamb Waves;
- Solar Oscillations;
- Sound Waves;
- Amplitudes;
- Chromosphere;
- Perturbation Theory;
- Photosphere;
- Solar Physics