Direct measurements of the magnetic fields in the shadows or half-shadows of sunspots using 146 spectral lines
Abstract
A narrow layer with essentially inhomogeneous magnetic field was found on height 40-60 km in two sunspots using the Zeeman spectrograms obtained on horizontal solar telescope of Astronomical observatory of Kyiv Taras Shevchenko University. Magnetic fields here, measured by different spectral lines, are very different (in range 600-2400 G). Dependence of results from Lande factor indicates that main cause of this disparity is surface-inhomogeneous magnetic field. The measurements can be explained in a frame of twocomponent model. In area of sunspot penumbra, where spectral manifestations of two-component structure are more substantial, the magnetic field strength in strong component is in range 1500-4000 G, and filling factor - 5/20%.
- Publication:
-
Bulletin of Taras Shevchenko National University of Kyiv Astronomy
- Pub Date:
- December 2012
- Bibcode:
- 2012BTSNU..49...26V