On plasma motions in the temperature minimum-photosphere region above sunspot umbrae

Details On plasma motions in the temperature minimum-photosphere region above sunspot umbrae On plasma motions in the temperature minimum-photosphere region above sunspot umbrae

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..161g&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 18, no. 2, p. 161-170

Physics

Scientific paper

We showed [3] that in the temperature minimum region above sunspot umbrae there seems to be a breach of the equation of continuity. To explain this phenomenon, we offer a model of plasma motion in the magnetic field above sunspot umbrae in the temperature minimum-photosphere region. An effective diffusion of plasma across force lines into the region of magnetic field takes place in the temperature minimum region. The hot plasma which penetrated into the magnetic field region of sunspot umbrae expands adiabatically and becomes cooler and heavier. Under the action of gravitational force this plasma flows downwards, and this is observed as plasma motions in the temperature minimum- photosphere region. The pressure, density, velocity, and temperature of the plasma are determined.

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