期刊
ASTROPHYSICAL JOURNAL
卷 615, 期 1, 页码 L41-L44出版社
UNIV CHICAGO PRESS
DOI: 10.1086/425215
关键词
acceleration of particles; MHD; turbulence
We present numerical studies of three-dimensional electron magnetohydrodynamic (EMHD) turbulence. We investigate the cascade timescale and anisotropy of freely decaying, strong EMHD turbulence with zero electron skin depth. The cascade time scales with k(-4/3). Our numerical results clearly show scale-dependent anisotropy. We find that the observed anisotropy is consistent with k(parallel to) proportional to k(perpendicular to)(1/3), where k(parallel to) and k(perpendicular to) are wavenumbers parallel and perpendicular to (local) mean magnetic field, respectively.
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