Magnetic fields and convection - New observations
Abstract
Fourier Transform Spectrometer observations of Fraunhofer-line displacement and asymmetry suggest that granular convection is inhibited in regions of magnetic activity. The observations and a method for removing the effects of solar rotation are discussed. In integrated sunlight ('the sun as a star'), records of line asymmetries indicate that a significant reduction in the amplitude of the sun's convective signature took place between 1980 and 1982. To the extent that full-disk line asymmetry arises strictly from convective motions, the results constitute strong evidence that magnetic activity influences (inhibits) convective motion on a global scale.
- Publication:
-
Solar and Stellar Magnetic Fields: Origins and Coronal Effects
- Pub Date:
- 1983
- Bibcode:
- 1983IAUS..102..149L
- Keywords:
-
- Convection;
- Solar Magnetic Field;
- Magnetic Flux;
- Solar Granulation;
- Solar Rotation;
- Solar Spectra;
- Solar Spectrometers;
- Solar Physics