ON THE OCCURRENCE OF THE THIRD-ORDER SCALING IN HIGH LATITUDE SOLAR WIND
- 13 April 2012
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 750 (1), 41
- https://doi.org/10.1088/0004-637x/750/1/41
Abstract
The occurrence and nature of a nonlinear energy cascade within the intermediate scales of solar wind Alfvénic turbulence represents an important open issue. Using in situ measurements of fast, high latitude solar wind taken by the Ulysses spacecraft at solar minima, it is possible to show that a nonlinear energy cascade of imbalanced turbulence is only observed when the solar wind owns peculiar properties. These are the reduction of the local correlation between velocity and magnetic field (weak cross-helicity); the presence of large-scale velocity shears; and the steepening and extension down to low frequencies of the turbulent spectra. Our observations suggest the important role of both large-scale velocity and Alfvénicity of the field fluctuations for the validation of the Yaglom law in solar wind turbulence.Keywords
This publication has 45 references indexed in Scilit:
- Solar wind turbulence and shear: A superposed‐epoch analysis of corotating interaction regions at 1 AUJournal of Geophysical Research, 2010
- Strong Imbalanced TurbulenceThe Astrophysical Journal, 2008
- Small‐Scale Energy Cascade of the Solar Wind TurbulenceThe Astrophysical Journal, 2008
- Solar wind Cluster observations: Turbulent spectrum and role of Hall effectPlanetary and Space Science, 2007
- On the Spectrum of Magnetohydrodynamic TurbulenceThe Astrophysical Journal, 2005
- The Solar Wind as a Turbulence LaboratoryLiving Reviews in Solar Physics, 2005
- ReplyJournal of Geophysical Research, 2002
- Alfvénic turbulence in the polar wind: A statistical study on cross helicity and residual energy variationsJournal of Geophysical Research, 2000
- The Heliospheric Magnetic Field Over the South Polar Region of the SunScience, 1995
- Large-amplitude Alfvén waves in the interplanetary medium, 2Journal of Geophysical Research, 1971