Temporal Variations in the Evershed Flow
Abstract
We present results of an analysis of the temporal Doppler variations of the Evershed flow. Doppler shifts were calculated from a unique, high-resolution data set of 39 spectral lines, spanning the photosphere and chromosphere. Our results indicate a quasi-periodic structure of the Evershed flow with a typical period between 18-24 minutes in the photosphere and 12-18 minutes in the chromosphere. We discuss the implications of these results for both the siphon flow and the moving flux tube models.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2004
- Bibcode:
- 2004AGUFMSH13A1141B
- Keywords:
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- 7500 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY;
- 7507 Chromosphere;
- 7524 Magnetic fields;
- 7529 Photosphere;
- 7536 Solar activity cycle (2162)