Resonant absorption of MHD surface waves in an arcade with a continuous boundary.

Details Resonant absorption of MHD surface waves in an arcade with a continuous boundary. Resonant absorption of MHD surface waves in an arcade with a continuous boundary.

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...305..977c&link_type=abstract

Astronomy and Astrophysics, v.305, p.977

Astronomy and Astrophysics

Astrophysics

12

Sun: Corona, Sun: Magnetic Fields, Magnetohydrodynamics

Scientific paper

We consider an isolated potential magnetic arcade with a thick boundary forming a layer with strongly nonpotential field, that separates the interior of the arcade from the ambient nonmagnetized plasma of the solar corona. It is shown that, in this case, local surface waves, having a relatively large wavelength compared to the layer thickness, can resonantly generate a continuous MHD slow mode spectrum within the layer. The obtained rate coefficient depends on the value of the field gradient at the place where the resonance occurs and it vanishes when the gradient tends to infinity.

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