Energy dissipation and convective motors in the local MHD-resonance regions in solar chromosphere

Details Energy dissipation and convective motors in the local MHD-resonance regions in solar chromosphere Energy dissipation and convective motors in the local MHD-resonance regions in solar chromosphere

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251...91v&link_type=abstract

In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 91-93 (SEE N87-15

Astronomy and Astrophysics

Astrophysics

Chromosphere, Convection, Energy Dissipation, Plasma Heating, Plasma Resonance, Solar Corona, Beta Factor, Plasma Layers, Plasma Oscillations, Radiant Flux Density, Solar Radiation

Scientific paper

Local energy deposition in the upper solar chromosphere due to the dissipation of the forced oscillations of the high beta plasma in the cusp-resonance region is discussed. The heating rate of plasma layers is obtained. It does not depend on absorption mechanisms. The heating time of the layer is estimated. This time has the same order of magnitude as the time of thermal perturbation relaxation at the altitudes considered. The absorption power density is of the order of the radiation power density from the solar atmosphere regions considered. For small amplitude oscillations, the energy absorption should be expected in the linear regime when the dissipative effects are essential. As a rule, the dissipative effects are small and the forced oscillations in the local resonance regions take place in the strong nonlinear regimes with the formation of discontinuous flows.

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