Spicules and surges. Part 1: Examination of two possible models

Details Spicules and surges. Part 1: Examination of two possible models Spicules and surges. Part 1: Examination of two possible models

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8330347b&link_type=abstract

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Physics

Chromosphere, Solar Activity, Solar Physics, Spicules, Surges, Hydrodynamics, Mathematical Models, Solar Magnetic Field, Solar Wind, Sunspots

Scientific paper

We adopt the position that spicules, macrospicules and surges are manifestations of the same phenomenon occurring on different scales. We therefore search for a mechanism which can be successfully applied to explain the phenomenon on all three scales. We first consider the possibility that the mechanism is the same as that which operates in producing the solar wind, except that the divergence of the magnetic ducts is much more rapid. We find that the mechanism fails to explain spicules, macrospicules or surges. For instance, if it produces speeds typical of spicules, the maximum height is much too small; if it reproduces the height, the required velocities are much too high. We also consider a variant of this mechanism proposed by Uchida in which the gas pressure is supplemented by the magnetic pressure of a gas composed of plasmoids. This mechanism also fails for similar reasons.

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