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Numerical hydrodynamics of the jet phenomena in the solar atmosphere

I. Spicules

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Abstract

We present a spicule model whose eruption occurs as a result of the sudden pressure enhancement at the bright point located at the root of the spicule. To show this, one dimensional (constant cross sectional) and time dependent hydrodynamic equations are solved numerically in the realistic solar atmosphere extending from the photosphere to the corona. Adiabatic motion is assumed. The pressure enhancement by a bright point at the base of the model atmosphere generates a shock wave. The shock gets stronger as it passes upward through the chromosphere and eventually collides with the chromosphere-corona interface which is a kind of a contact discontinuity. As the result, the interface begins to move upward. We identify the matter following behind this interface as the solar spicule. The model explains many observed features, such as the height and the density of the spicules, although such features have been hitherto considered not to be explained easily by shock theories.

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Authors and Affiliations

  1. Department of Astronomy, Faculty of Science, University of Kyoto, 606, Kyoto, Japan

    Yoshinori Suematsu, Kazunari Shibata, Takara Nishikawa & Reizaburo Kitai

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  1. Yoshinori Suematsu
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  2. Kazunari Shibata
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  3. Takara Nishikawa
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  4. Reizaburo Kitai
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Suematsu, Y., Shibata, K., Nishikawa, T. et al. Numerical hydrodynamics of the jet phenomena in the solar atmosphere. Sol Phys 75, 99–118 (1982). https://doi.org/10.1007/BF00153464

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  • DOI: https://doi.org/10.1007/BF00153464

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