The interpretation of the total magnetic vector measurements in sun spots

Astronomy and Astrophysics – Astronomy

Scientific paper

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Magnetic Measurement, Solar Magnetic Field, Sunspots, Vector Analysis, Current Density, Magnetic Moments, Magnetometers, Solar Spectrometers, Spectral Resolution, Zeeman Effect

Scientific paper

A large change in the magnetic field with depth in the spot was found on the basis of the total vector (H) measurements at two levels corresponding to the depths of the line formations lambda 5250 A Fe and lambda 6103 A Ca. The spiralling of the horizontal field and its rotation with depth were observed where the vertical field increases with height. The densities of the vertical and horizontal electric currents in the spot are equal to approximately 5000 and approximately 100,000 CGSE respectively. The discrepancy between the height gradients of the vertical field inside the spot was obtained from the measured vertical field at two levels and from the use of the equation div H = O. This discrepancy may be attributed to the difference between the very high resolution at depth and the low resolution on the sun's surface.

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