Article Dans Une Revue The Astrophysical Journal Letters Année : 2021

Small-scale Induced Large-scale Transitions in Solar Wind Magnetic Field

Résumé

We investigate the role of sub-proton dynamics in inducing large-scale transitions in the solar wind magnetic eld by means of dynamical systems metrics based on instantaneous fractal dimensions. By looking at the corresponding multiscale features, we observe a break in the average attractor dimension occurring at the crossover between the inertial and the sub-proton regime. Our analysis suggests that large-scale transitions are induced by sub-proton dynamics through an inverse cascade mechanism driven by local correlations, while electron contributions (if any) are hidden by instrumental noise.

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Dates et versions

hal-03189425 , version 1 (03-04-2021)
hal-03189425 , version 2 (06-05-2021)

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Tommaso Alberti, Davide Faranda, Reik V Donner, Theophile Caby, Vincenzo Carbone, et al.. Small-scale Induced Large-scale Transitions in Solar Wind Magnetic Field. The Astrophysical Journal Letters, 2021, 914:L6, pp.1-7. ⟨10.3847/2041-8213/ac0148⟩. ⟨hal-03189425v2⟩
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