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Observations of Magnetic Fields in Quiescent Prominences

Published online by Cambridge University Press:  14 August 2015

Einar Tandberg-Hanssen
Einar Tandberg-Hanssen*
Affiliation:
High Altitude Observatory, National Center for Atmospheric Research,* Boulder, Colo., U.S.A.

Abstract

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The longitudinal component of the magnetic field, B∥, has been recorded in about 135 quiescent prominences observed at Climax during the period 1968–1969. The measurements were obtained with the magnetograph which records the Zeeman effect on hydrogen, helium and metal lines. The following lines were used, Hα; He I, D3, He I, 4471 Å; Na I, D1 and D2, and the observed magnetic field component in these prominences was independent of the line. The overall mean value of the field B∥ for all the prominences was 7.3G. As a rule, the magnetic field enters the prominence on one side and exits on the other, but in traversing the prominence material, the field tends to run along the long axis of the prominence.

Type
Part III: Observations of Sunspot and Active Region Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 192 - 200
Copyright
Copyright © Reidel 1971 

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