The Spectrum and Small-Scale Structures of Magnetohydrodynamic Turbulence

Details The Spectrum and Small-Scale Structures of Magnetohydrodynamic Turbulence The Spectrum and Small-Scale Structures of Magnetohydrodynamic Turbulence

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..365..315m&link_type=abstract

SINS - Small Ionized and Neutral Structures in the Diffuse Interstellar Medium ASP Conference Series, Vol. 365, Proceedings of t

Astronomy and Astrophysics

Astronomy

1

Scientific paper

A theory of incompressible MHD turbulence in the presence of a strong guiding magnetic field is described. Numerical results that show good agreement with the theory are also presented. The theory was developed in tet{boldyrev,boldyrev2} and predicts that in the plane perpendicular to the guiding field, the velocity and magnetic field fluctuations align within a scale dependent angle θλ∝ λ1/4. The phenomena is known as dynamic alignment and leads to the field-perpendicular energy spectrum E(k⊥)∝ k⊥-3/2. The results are of interest in understanding turbulence in the interstellar medium and may provide a natural explanation for the recent observations of interstellar scintillations of PSR 0329+54 and PSR J0437-4715 tep{shishov,smirnova}.

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