Alfvén waves are known to be the dominant modes in the turbulence spectrum in fast solar wind streams, but their evolution with heliocentric distance has not a clear explanation yet. Here the stability of monochromatic large-amplitude Alfvén waves is investigated via MHD numerical simulations. The nonlinear evolution of parametric decay seems to be a viable mechanism to explain the observed bahaviour.
Parametric nonlinear evolution of Alfvén waves in the fast solar wind / Del Zanna, Luca. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - STAMPA. - 74:(2003), pp. 737-740.
Parametric nonlinear evolution of Alfvén waves in the fast solar wind
DEL ZANNA, LUCA
2003
Abstract
Alfvén waves are known to be the dominant modes in the turbulence spectrum in fast solar wind streams, but their evolution with heliocentric distance has not a clear explanation yet. Here the stability of monochromatic large-amplitude Alfvén waves is investigated via MHD numerical simulations. The nonlinear evolution of parametric decay seems to be a viable mechanism to explain the observed bahaviour.
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