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Spicules: The resonant response to granular buffeting?

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Abstract

We propose that spicules are the direct result of a resonant buffeting of the sides of an intense (kilogauss) slender flux tube by turbulent granular motions. For a critical wavespeed, the granular motion drives a high-speed flow along the axis of the tube. We illustrate this effect by considering in detail a flux tube embedded in a uniform compressible atmosphere, thereby modelling the development of the ‘seedflow’ in the photosphere that eventually manifests itself in the chromosphere as the spicule.

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Authors and Affiliations

  1. Dept. of Applied Mathematics, University of St. Andrews, St. Andrews, Fife, Scotland

    B. Roberts

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  1. B. Roberts
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Roberts, B. Spicules: The resonant response to granular buffeting?. Sol Phys 61, 23–34 (1979). https://doi.org/10.1007/BF00155443

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  • DOI: https://doi.org/10.1007/BF00155443

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