Scattering of long wavelength shear Alfvén waves by a localized density cavity

Details Scattering of long wavelength shear Alfvén waves by a localized density cavity Scattering of long wavelength shear Alfvén waves by a localized density cavity

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3405102s&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 5, CiteID L05102

Physics

4

Ionosphere: Plasma Waves And Instabilities (2772), Ionosphere: Wave Propagation (0689, 3285, 4275, 4455, 6934), Magnetospheric Physics: Auroral Phenomena (2407)

Scientific paper

We demonstrate here, for the first time, that the scattering of a shear Alfvén wave (SAW) having a long perpendicular wavelength (λ $\perp$ ), with a localized density cavity, generates perturbations in the field structures like that expected from the radiation pattern of an Alfvén wave resonance cone (AWRC) emitted from localized sources. Such a SAW-cavity interaction provides a novel mechanism for generating narrow structures of inertial Alfvén waves like those observed from satellites and variously called solitary, kinetic and dispersive Alfvén waves.

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