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The Hale solar sector boundary

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Abstract

A Hale solar sector boundary is defined as the half (northern hemisphere or southern hemisphere) of a sector boundary in which the change of sector magnetic field polarity is the same as the change of polarity from a preceding spot to a following spot. Above a Hale sector boundary the green corona has maximum brightness, while above a non-Hale boundary the green corona has a minimum brightness. The Hale portion of a photospheric sector boundary tends to have maximum magnetic field strength, while the non-Hale portion has minimum field strength.

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Authors and Affiliations

  1. Institute for Plasma Research, Stanford University, Stanford, California, USA

    Leif Svalgaard & John M. Wilcox

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  1. Leif Svalgaard
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  2. John M. Wilcox
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Svalgaard, L., Wilcox, J.M. The Hale solar sector boundary. Sol Phys 49, 177–185 (1976). https://doi.org/10.1007/BF00221492

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  • DOI: https://doi.org/10.1007/BF00221492

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