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Time Evolution of the Large-Scale Solar Magnetic Field

Published online by Cambridge University Press:  14 August 2015

Martin D. Altschuler ,
Gordon Newkirk Jr. ,
Dorothy E. Trotter  and
Robert Howard
Martin D. Altschuler
Affiliation:
High Altitude Observatory, National Center for Atmospheric Research*, Boulder, Colo., U.S.A.
Gordon Newkirk Jr.
Affiliation:
High Altitude Observatory, National Center for Atmospheric Research*, Boulder, Colo., U.S.A.
Dorothy E. Trotter
Affiliation:
High Altitude Observatory, National Center for Atmospheric Research*, Boulder, Colo., U.S.A.
Robert Howard
Affiliation:
Hale Observatories, Pasadena, Calif., U.S.A.

Abstract

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The six years of data from the Mt. Wilson Magnetic Atlas were analyzed in terms of surface harmonics. Between 1959 and 1962 the dominant harmonic corresponded to a dipole lying in the plane of the equator (2 sectors). There was also a significant zonal harmonic in which both solar poles had the same magnetic polarity, opposite to that at the equator. From the end of 1962 through 1964, the harmonic corresponding to 4 sectors was dominant. In 1965 and 1966, the harmonic of the north-south dipole became significant.

Type
Part VI: Optical and Radio Observations of Large Scale Magnetic Fields on the Sun
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 588 - 594
Copyright
Copyright © Reidel 1971 

References

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