@article{Matteini:2010:10.1029/2010gl044806,
author = {Matteini, L and Landi, S and Del, Zanna L and Velli, M and Hellinger, P},
doi = {10.1029/2010gl044806},
journal = {Geophysical Research Letters},
title = {Parametric decay of linearly polarized shear Alfvén waves in oblique propagation: One and twodimensional hybrid simulations},
url = {http://dx.doi.org/10.1029/2010gl044806},
volume = {37},
year = {2010}
}

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TY  - JOUR
AB  - <jats:p>The parametric instability of a monochromatic shear Alfvén wave in oblique propagation with respect the ambient magnetic field is investigated in a kinetic regime, performing onedimensional (1D) and twodimensional (2D) hybrid simulations. The parallel component of the mother wave is found to be subject to a parametric decay which excites an ionacoustic wave along the magnetic field and a backward propagating daughter shear Alfvén wave, as in the instability for a purely parallel mother wave. At the same time, the acoustic wave generation supports the acceleration of a velocity beam in the ion distribution function, due to the nonlinear trapping of protons. Moreover, the instability leads to the generation of broad band oblique spectra of coupled Alfvénic and compressive modes with variable perpendicular wavevectors, and, as a consequence, the magnetic field after saturation is characterized by a strong transverse modulation.</jats:p>
AU  - Matteini,L
AU  - Landi,S
AU  - Del,Zanna L
AU  - Velli,M
AU  - Hellinger,P
DO  - 10.1029/2010gl044806
PY  - 2010///
SN  - 0094-8276
TI  - Parametric decay of linearly polarized shear Alfvén waves in oblique propagation: One and twodimensional hybrid simulations
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2010gl044806
VL  - 37
ER  - 

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