• Publications
  • Influence
Dependence of Solar-Wind Power Spectra on the Direction of the Local Mean Magnetic Field
Wavelet analysis can be used to measure the power spectrum of solar-wind fluctuations along a line in any direction (θ, ) with respect to the local mean magnetic field B 0. This technique is appliedExpand
Spectral Exponents of Kinetic and Magnetic Energy Spectra in Solar Wind Turbulence
Kinetic and magnetic energy spectra in the ecliptic plane near 1 AU are found to exhibit different power-law behaviors in the inertial range, with the magnetic spectrum often having a power-lawExpand
Spectral Scaling Laws in Magnetohydrodynamic Turbulence Simulations and in the Solar Wind
The question is addressed as to what extent incompressible magnetohydrodynamics can describe random magnetic and velocity fluctuations measured in the solar wind. It is demonstrated thatExpand
MAGNETIC HELICITY SPECTRUM OF SOLAR WIND FLUCTUATIONS AS A FUNCTION OF THE ANGLE WITH RESPECT TO THE LOCAL MEAN MAGNETIC FIELD
Magnetic field data acquired by the Ulysses spacecraft in high-speed streams over the poles of the Sun are used to investigate the normalized magnetic helicity spectrum {sigma}{sub m} as a functionExpand
INTERPRETING MAGNETIC VARIANCE ANISOTROPY MEASUREMENTS IN THE SOLAR WIND
The magnetic variance anisotropy () of the solar wind has been used widely as a method to identify the nature of solar wind turbulent fluctuations; however, a thorough discussion of the meaning andExpand
Effect of Differential Flow of Alpha Particles on Proton Pressure Anisotropy Instabilities in the Solar Wind
In the solar wind, when the effects of proton-proton Coulomb collisions are negligible, alpha particles usually flow faster than the protons in such a way that the differential alpha-proton flowExpand
Scale invariance of normalized cross-helicity throughout the inertial range of solar wind turbulence
Solar wind measurements over the period from 1995 through 2006 are used to study fluctuations in the plasma bulk velocity and magnetic field over the range of magnetohydrodynamic (MHD) scalesExpand
Laws for third-order moments in homogeneous anisotropic incompressible magnetohydrodynamic turbulence
  • J. Podesta
  • Physics
  • Journal of Fluid Mechanics
  • 31 July 2008
It is known that Kolmogorov's four-fifths law for statistically homogeneous and isotropic turbulence can be generalized to anisotropic turbulence. This fundamental result for homogeneous anisotropicExpand
Multifractal Characteristics of Dynamical Complexity in Space Plasmas
A brief narrative description of the phenomenon of dynamical complexity is presented. Intermittency characteristics of such phenomena are considered based on the rank—ordered multifractal spectrum, aExpand
Evidence of Kinetic Alfvén Waves in the Solar Wind at 1 AU
Several independent lines of observational evidence of the existence of kinetic Alfvén waves (KAWs) in the solar wind are briefly reviewed. Each piece of evidence is inconclusive when consideredExpand
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