Dynamics of the solar atmosphere. V - Partial reflection and forced oscillation, and their signature in phase diagrams
Abstract
An overview of several new dynamic phenomena detected by means of velocity-brightness (V-I) and V-V phase diagrams is presented. The great diagnostic value of this kind of data analysis is demonstrated and used in order to develop a consistent description and interpretation of the surprisingly broad spectrum of linear hydrodynamic wave motions that occur in a stellar atmosphere. The significance of partial reflection and the role of forced oscillations in practically all layers of the solar atmosphere are demonstrated. With reference to the concept of continuous partial reflection, a model of the 'background' of coherent wave motions found at frequencies and wavenumbers in between the well-known p-mode ridges is presented.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1992
- Bibcode:
- 1992A&A...266..560D
- Keywords:
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- Phase Diagrams;
- Solar Atmosphere;
- Solar Oscillations;
- Solar Physics;
- Chromosphere;
- P Waves;
- Wave Propagation;
- Wave Reflection;
- Solar Physics