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Paper: Ca II K Scattering Polarization as Chromospheric Temperature and Magnetic Field Sensor
Volume: 405, Solar Polarization 5: In Honor of Jan Olof Stenflo
Page: 101
Authors: Holzreuter, R.
Abstract: The linear scattering polarization of the Ca II K line is a very sensitive tool to determine the temperature profile in the high photosphere and low chromosphere. We present the spatial variation at several heliocentric angles and different wavelengths. Observations of a plage region show a surprising decrease of scattering polarization not expected from standard model calculations. Colder parts in the plage region could serve as a possible explanation.
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