Ca II K Scattering Polarization as Chromospheric Temperature and Magnetic Field Sensor

Details Ca II K Scattering Polarization as Chromospheric Temperature and Magnetic Field Sensor Ca II K Scattering Polarization as Chromospheric Temperature and Magnetic Field Sensor

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..405..101h&link_type=abstract

Solar Polarization 5: In Honor of Jan Stenflo ASP Conference Series, Vol. 405, proceedings of the conference held 17-21 Septembe

Astronomy and Astrophysics

Astronomy

Scientific paper

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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