Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.505..301c&link_type=abstract
In: SOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference and IAU Colloquium 188, 11 - 15 Jun
Physics
1
Solar Atmosphere, Alfven Waves, Non-Linear Dynamics
Scientific paper
The nonlinear evolution of a large-amplitude left-hand circularly polarized Alfvén wave propagating along an ambient magnetic field in the solar atmosphere is investigated by studying numerically the stationary solutions of the derivative nonlinear Schrödinger equation, in the presence of dissipation and external forcing. The onset of Alfvén turbulence due to a transition from order to chaos is discussed. We show that Alfvén chaos can arise either from a saddle-node bifurcation or a global bifurcation. The former leads to the type-I Pomeau-Manneville intermittency whereby the time series of the magnetic field fluctuations switches intermittently between periodic and turbulent states; the latter leads to the birth/destruction of a chaotic attractor via a boundary crisis. In addition, we show that Alfvén intermittency can appear from a global bifurcation associated with an interior crisis whereby the time series of the magnetic field fluctuations switches intermittently between weakly and strongly turbulent states. The significance of this chaos theory of Alfvén turbulence for solar atmosphere is considered.
Borotto Félix A.
Chian Abraham C. -L.
Rempel Erico L.
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