Physics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...50..297l&link_type=abstract
Solar Physics, vol. 50, Nov.-Dec. 1976, p. 297-310.
Physics
2
Absorption Spectra, Filtergrams, Magnetic Measurement, Solar Magnetic Field, Solar Spectra, Spectroheliographs, Zeeman Effect, Doppler Effect, Fine Structure, Line Spectra, Polarized Light, Spectral Resolution
Scientific paper
An expression is derived for the contrast variation of a hypothetical magnetic element observed with a tunable monochromatic filter or spectroheliograph in a triplet Zeeman line. The theory is valid for a magnetic field of arbitrary strength and direction as well as for polarizing and nonpolarizing optics. Numerical results are presented for both a stationary and a moving magnetic element over a range of field strengths and directions. They provide a simple diagnostic means of inferring the presence or, alternatively, the absence of strong fields, such as the kilogauss network fields postulated by Stenflo (1973) and others on the basis of indirect evidence. The proposed method of measuring strong fields is capable of very high spatial resolution and is free of the saturation effects encountered in the conventional magnetograph.
Bray Roger J.
Loughhead R. E.
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