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Vector magnetic fields in sunspots

I. Weak-line observations

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Abstract

Observations of a round, unipolar sunspot in the Zeeman triplet Fe i λ6302.5 with the High Altitude Observatory Stokes Polarimeter are used to derive the vector magnetic field in the spot. The behavior of the magnitude, inclination, and azimuth of the field vector B across the spot is discussed. A linear relation is found between the continuum intensity I c and the field magnitude B.

Time series obtained in the umbra show significant power in the magnitude of the field at a period of t ∼ 180 s but the other components of the field vector do not display this behavior.

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Authors and Affiliations

  1. High Altitude Observatory, National Center for Atmospheric Research, 80307, Boulder, Colo., U.SA.

    Joseph B. Gurman & Lewis L. House

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  1. Joseph B. Gurman
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  2. Lewis L. House
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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Gurman, J.B., House, L.L. Vector magnetic fields in sunspots. Sol Phys 71, 5–20 (1981). https://doi.org/10.1007/BF00153602

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  • DOI: https://doi.org/10.1007/BF00153602

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