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| Paper: |
Hanle Effect of Weak Solar Magnetic Fields |
| Volume: |
205, The Last Total Solar Eclipse of the Millennium in Turkey |
| Page: |
156 |
| Authors: |
Faurobert, M. |
| Abstract: |
The Hanle effect provides a diagnostic tool for weak magnetic fields, which do not give rise to a measurable Zeeman effect, such as turbulent fields or magnetic canopies in the chromosphere. The lines which are sensitive to the Hanle effect are formed under non-LTE conditions by scattering of photons. After a brief description of the physical mechanism at hand, I present some approximate expressions for the linear polarization of such lines in the presence of a weak magnetic field and show how the Hanle effect may be used for the diagnostics of magnetic canopies. |
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