Numerical simulations of large-scale solar wind fluctuations observed by Ulysses at high heliographic latitudes

Date

1995-12-01

Department

Program

Citation of Original Publication

“Numerical Simulations of Large‐scale Solar Wind Fluctuations Observed by Ulysses at High Heliographic Latitudes - Goldstein - 1995 - Geophysical Research Letters - Wiley Online Library.” Accessed October 24, 2023. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/95GL03412#.

Rights

This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0

Subjects

Abstract

An analysis of Ulysses plasma and magnetic field data from the high southern latitude pass revealed that at large spatial scales corresponding to wave frequencies below 10⁻⁵ Hz in the spacecraft frame, there is a transition from highly Alfvénic turbulence in all three spatial components of the fields to fluctuations which are Alfvénic only in field components transverse to the radial direction with uncorrelated radial magnetic and velocity fields. We find that the general properties of the turbulence can be simulated using a spectral method solution of the magnetohydrodynamic (MHD) equations only when certain types of initial conditions are employed. These simulations place constraints on conditions in the solar atmosphere that can generate the observed fluctuations.