The variation of the solar granulation structure in active and non-active regions
Abstract
With the aid of a coherence analysis between line-center velocities, continuum-brightness variations and residual intensities the height-dependent evolution of overshooting convective elements in the solar photosphere is studied in magnetically active and nonactive regions. Evidence of a structuring influence of the magnetic field on the height dependent evolution of temperature and velocity patterns is found. From a comparison of intensity and velocity-frequency distributions in nonactive and active regions enhanced downward motions in active regions were found. The results are in agreement with small fluxtube concepts.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1991
- Bibcode:
- 1991A&A...251..307H
- Keywords:
-
- Photosphere;
- Solar Activity;
- Solar Granulation;
- Solar Magnetic Field;
- Solar Spectra;
- Solar Wind;
- Temperature Distribution;
- Velocity Distribution;
- Solar Physics