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The formation of the Ca ii K line in a spinning spicule

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Abstract

The emission of the Ca ii K line from a spinning cylindrical spicule model is considered. In order to reproduce the observed spicule K line profiles, the model must have both radial and axial gradients in N e and T e. The rotating spicule model is optically thin at all heights and is hotter and more dense than a stationary model computed in a previous paper. It is proposed that the so-called Type I and Type II spicules may be structurally the same features, with different rotational velocities.

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Author notes

  1. Lorne W. Avery

    Present address: Astrophysics Branch, National Research Council M-50, 7, Ottawa, Ontario, Canada

Authors and Affiliations

  1. National Center for Atmospheric Research, Boulder, Colo, U.S.A.

    Lorne W. Avery

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  1. Lorne W. Avery
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.

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Avery, L.W. The formation of the Ca ii K line in a spinning spicule. Sol Phys 13, 301–311 (1970). https://doi.org/10.1007/BF00153551

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  • DOI: https://doi.org/10.1007/BF00153551

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