Resonant Absorption as Mode Conversion? II. Temporal Ray Bundle

Details Resonant Absorption as Mode Conversion? II. Temporal Ray Bundle Resonant Absorption as Mode Conversion? II. Temporal Ray Bundle

2010-11-16

arxiv.org/abs/1011.3808v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 4 figures, accepted (15 Nov 2010) by Solar Physics. Ancillary file (animation) attached

Scientific paper

10.1007/s11207-010-9681-6

A fast-wave pulse in a simple, cold, inhomogeneous MHD model plasma is constructed by Fourier superposition over frequency of harmonic waves that are singular at their respective Alfven resonances. The pulse partially reflects before reaching the resonance layer, but also partially tunnels through to it to mode convert to an Alfven wave. The exact absorption/conversion coefficient for the pulse is shown to be given precisely by a function of transverse wavenumber tabulated in Paper I of this sequence, and to be independent of frequency and pulse width.

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