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The Evershed motion in sunspots

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Abstract

The Evershed motion is postulated as a steady, laminar flow of material along a limiting field line which separates the umbral magnetic field from the penumbral. Assuming that the Evershed flow starts from the spot-base with a velocity which is adequate to carry the convective flux at that level, the velocity at the surface comes out to be of the order of 1 km/sec, in good agreement with the observed Evershed velocity.

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Author notes

  1. S. M. Chitre

    Present address: Tata Institute of Fundamental Research, Bombay

Authors and Affiliations

  1. California Institute of Technology, Pasadena, Calif., U.S.A.

    S. M. Chitre

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  1. S. M. Chitre
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Additional information

Supported in part by the National Science Foundation [GP-5391] and the Office of Naval Research [Nonr-220 (47)].

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Chitre, S.M. The Evershed motion in sunspots. Sol Phys 4, 168–175 (1968). https://doi.org/10.1007/BF00148078

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  • DOI: https://doi.org/10.1007/BF00148078

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