Solar Wind Turbulence: New Advances from the Parker Solar Probe and Solar Orbiter Space Missions

A special issue of Universe (ISSN 2218-1997).

Deadline for manuscript submissions: closed (1 December 2020) | Viewed by 2852

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Guest Editor
National Institute for Astrophysics, Astrophysical Observatory of Torino, Via Osservatorio 20, 10025 Pino Torinese, Italy
Interests: solar wind turbulence; kinetic theory of space plasmas; coronal heating and acceleration processes; data analysis
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Special Issue Information

Dear Colleagues,

Turbulence is a universal phenomenon observed everywhere in Nature (from atmospheric and ocean fluid flows on Earth to space plasmas) and every day in ordinary life. Nevertheless, it is the last unsolved problem of classical physics (Feynman R. P., 2005). The solar wind—a turbulent plasma flow emitted by the Sun and expanding into the heliosphere—is the only and the best available laboratory to study turbulence in an astrophysical plasma. Recent launches of the Parker Solar Probe (which will approach the Sun closer than ever before) and the Solar Orbiter spacecraft (which will study the Sun with a complete suite of remote-sensing and in-situ instruments) will significantly advance our understanding of space plasma turbulence, allowing us to tackle still-unanswered questions spanning from macrostructure to microphysics, such as: How and where does turbulence originate? Which are the physical mechanisms responsible for the energy transfer from large to small scales in the turbulent cascade? How is energy dissipated to heat the plasma? This Special Issue aims to collect research papers on pioneering observations which will help to shed light on these fundamental and still unanswered questions in space plasma physics.

Dr. Daniele Telloni
Guest Editor

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Keywords

  • solar wind
  • turbulence
  • space plasmas
  • heliosphere
  • magnetohydrodynamics (MHD)
  • space vehicles

Published Papers (1 paper)

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14 pages, 1764 KiB  
Article
Statistical Analysis of Field-Aligned Alfvénic Turbulence and Intermittency in Fast Solar Wind
by Francesco Carbone, Daniele Telloni, Luca Sorriso-Valvo, Gary Zank, Lingling Zhao, Laxman Adhikari and Roberto Bruno
Universe 2020, 6(8), 116; https://doi.org/10.3390/universe6080116 - 9 Aug 2020
Cited by 5 | Viewed by 2189
Abstract
The statistical properties of fast Alfvénic solar wind turbulence have been analyzed by means of empirical mode decomposition and the associated Hilbert spectral analysis. The stringent criteria employed for the data selection in the Wind spacecraft database, has made possible to sample multiple [...] Read more.
The statistical properties of fast Alfvénic solar wind turbulence have been analyzed by means of empirical mode decomposition and the associated Hilbert spectral analysis. The stringent criteria employed for the data selection in the Wind spacecraft database, has made possible to sample multiple k field-aligned intervals of the three magnetic field components. The results suggest that the spectral anisotropy predicted by the critical balance theory is not observed in the selected database, whereas a Kolmogorov-like scaling (E(k)k5/3) and a weak or absent level of intermittency are robust characteristics of the Alfvénic slab component of solar wind turbulence. Full article
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