Variation of the azimuth of sunspot magnetic field with depth

Details Variation of the azimuth of sunspot magnetic field with depth Variation of the azimuth of sunspot magnetic field with depth

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cha%26a..14..317y&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 14, Issue 3, p. 317-324.

Astronomy and Astrophysics

Astrophysics

The Sun-Sunspots-Magnetic Fields

Scientific paper

In order to construct three-dimensional sunspot magnetic field models we must ascertain the azimuth of the field χ and its possible variation with depth. Here we propose a method of finding the variation of χ with depth. For a fixed point in the sunspot we measure the two Stokes parameters Q and U at different parts of a magneto-sensitive line. We can then draw the azimuth diagram first suggested by Makita and refined by us. If the locus in this diagram contains loops, then we can conclude that χ varies systematically with depth, otherwise the locus will have a simple shape like a parabola.
This method can be used to the weaker fields outside sunspots, provided the detector is sufficiently sensitive.

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