Magnetograph Response to Canopy-Type Fields
Abstract
The response of longitudinal-field magnetographs to magnetic fields which are semi-infinite or confined to a horizontal layer is discussed with respect to the interpretation of solar diffuse fields, observed towards the limb, in terms of magnetic canopy models. Numerical results are presented for several reference solar models and typical `calibration' curves are shown for the C I 9111 Å, Fe I 8688 Å, and Ca II 8542 Å lines in magnetostatic atmospheres derived from a mean model. A procedure is developed for determining the base heights of magnetic canopies from observations with an uncertainty not exceeding the order of a pressure scale height. Until definitive information regarding atmospheric structure inside flux tubes can be developed from theory or observation, reliable field strengths cannot be derived from the data.
- Publication:
-
Solar Physics
- Pub Date:
- August 1982
- DOI:
- 10.1007/BF00146243
- Bibcode:
- 1982SoPh...79..247J
- Keywords:
-
- Chromosphere;
- Magnetic Signatures;
- Solar Magnetic Field;
- Stellar Models;
- Line Spectra;
- Magnetostatic Fields;
- Solar Limb;
- Solar Physics;
- Atmosphere;
- Magnetic Field;
- Field Strength;
- Flux Tube;
- Scale Height