Polarization-Magnetic Field Calibration Curve

Details Polarization-Magnetic Field Calibration Curve Polarization-Magnetic Field Calibration Curve

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pkas...12....1k&link_type=abstract

Publications of the Korean Astronomical Society, vol.12, no.1, p.1-21

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4

Scientific paper

We have obtained theoretical calibration curves to convert the amount of polarization into the strength of magnetic field, by a numerical calculation of radiation transfer for the polarized spectral line of FeI 6303A. In our calculation, three kinds of atmospheric models (VAL-C, penumbra, umbra) have been used to make a proper calibration for an active region composed of quiet, penumbral and umbral areas. It was found that firstly, the results of our calculation depend highly on a kind of atmospheric model rather than on any other input parameters used in a model. Secondly, observed line profile showed in solar spectrum atlas proved to be very similar to the calculated profiles obtained by using a penumbral model. Finally, another method except this calibration curve should be developed to estimate correctly the distribution of magnetic field in solar active region from the observation of polarized spectral line.

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