A diagnostic method for probing the possible twist of magnetic field lines in sunspots

Details A diagnostic method for probing the possible twist of magnetic field lines in sunspots A diagnostic method for probing the possible twist of magnetic field lines in sunspots

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..129..247y&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 129, Oct. 1990, p. 247-258.

Physics

Lines Of Force, Magnetic Field Configurations, Plasma Diagnostics, Solar Magnetic Field, Sunspots, Coronal Loops, Line Spectra, Wavelengths

Scientific paper

A method is proposed for the study of the three-dimensional structure of sunspot magnetic fields in order to ascertain whether the azimuthal angle of transverse field changes with depth. The method involves the measurement of the two Stokes parameters Q and U at a fixed point in a spot, for a certain wavelength interval of a magnetically sensitive spectral line, and the calculation of the azimuthal angle of the polarization plane. In view of the present theoretical calculations, a sufficiently strong twisting of the suspot field lines will result in a Makita (1986) diagram curve containing loop structures. The sense of curve-winding will allow inference of the direction in which the magnetic field is twisting.

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