Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...645l..85s&link_type=abstract
The Astrophysical Journal, Volume 645, Issue 1, pp. L85-L88.
Astronomy and Astrophysics
Astronomy
86
Magnetohydrodynamics: Mhd, Sun: Solar Wind, Turbulence, Waves
Scientific paper
We investigate the nature of turbulent magnetic dissipation in the solar wind. We employ a database describing the spectra of over 800 intervals of interplanetary magnetic field and solar wind measurements recorded by the ACE spacecraft at 1 AU. We focus on the spectral properties of the dissipation range that forms at spacecraft frequencies >=0.3 Hz and show that while the inertial range at lower frequencies displays a tightly constrained range of spectral indexes, the dissipation range exhibits a broad range of power-law indexes. We show that the explanation for this variation lies with the dependence of the dissipation range spectrum on the rate of energy cascade through the inertial range such that steeper spectral forms result from greater cascade rates.
Hamilton Kathleen
Leamon Robert J.
Smith Charles W.
Vasquez Bernard J.
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