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Turbulent Heating and Anisotropy in the Solar Wind

A Numerical Study

  • Book
  • © 2019

Overview

Authors:
  1. Victor Montagud-Camps

    1. Department of Surface and Plasma Science, Charles University, Prague, Czech Republic

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  • Nominated as an outstanding PhD thesis by the Physics Department of Paris-Sud University, Orsay, France
  • Proves for the first time, using direct numerical simulations, that turbulent heating is one of the main contributors to solar wind heating between 0.3 and 1AU
  • Demonstrates that the observed turbulent wave vector anisotropy at 1AU is linked to turbulent anisotropy near the Sun, and to the imbalance of Alfvén wave populations
  • Provides results that allow us to hypothesize on the properties of solar wind turbulence near the Sun, at the end of the so-called acceleration region of the wind, and which could be verified by Parker Solar Probe and Solar Orbiter missions

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (14 chapters)

  1. Front Matter

    Pages i-xvii
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  2. Introduction

    1. Front Matter

      Pages 1-1
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    2. Solar Wind

      • Victor Montagud-Camps
      Pages 3-10

    3. Plasma Description

      • Victor Montagud-Camps
      Pages 11-18

    4. Turbulence

      • Victor Montagud-Camps
      Pages 19-32

    5. Solar Wind Turbulence

      • Victor Montagud-Camps
      Pages 33-49

  3. The Maltese Cross Revisited

    1. Front Matter

      Pages 51-52
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    2. Parameters and Initial Conditions

      • Victor Montagud-Camps
      Pages 53-56

    3. Defining Spectral Properties in EBM Simulations

      • Victor Montagud-Camps
      Pages 57-60

    4. Results

      • Victor Montagud-Camps
      Pages 61-66

    5. Discussion

      • Victor Montagud-Camps
      Pages 67-69

  4. Can the Maltese Cross heat?

    1. Front Matter

      Pages 71-71
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    2. 1D Turbulent Heating

      • Victor Montagud-Camps
      Pages 73-81

    3. Heating of Slow Winds

      • Victor Montagud-Camps
      Pages 83-98

    4. Heating Fast Winds

      • Victor Montagud-Camps
      Pages 99-104

    5. Discussion

      • Victor Montagud-Camps
      Pages 105-108

  5. Conclusions and Future Work

    1. Front Matter

      Pages 109-109
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    2. Conclusions

      • Victor Montagud-Camps
      Pages 111-115

    3. Future Work: Temperature Anisotropy Description

      • Victor Montagud-Camps
      Pages 117-118

  6. Back Matter

    Pages 119-123
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Keywords

About this book

This book presents two important new findings. First, it demonstrates from first principles that turbulent heating offers an explanation for the non-adiabatic decay of proton temperature in solar wind. Until now, this was only proved with reduced or phenomenological models. Second, the book demonstrates that the two types of anisotropy of turbulent fluctuations that are observed in solar wind at 1AU originate not only from two distinct classes of conditions near the Sun but also from the imbalance in Alfvén wave populations. These anisotropies do not affect the overall turbulent heating if we take into account the relation observed in solar wind between anisotropy and Alfvén wave imbalance. 


In terms of the methods used to obtain these achievements, the author shows the need to find a very delicate balance between turbulent decay and expansion losses, so as to directly solve the magnetohydrodynamic equations, including the wind expansion effects. 


Authors and Affiliations

  • Department of Surface and Plasma Science, Charles University, Prague, Czech Republic

    Victor Montagud-Camps

About the author

Victor Montagud Camps holds a bachelor degrees in mathematics and physics from the Universitat Autonoma de Barcelona (UAB) and  a Master's degree in plasma physics from the Université Pierre et Marie Curie (UPMC). He obtained his Ph.D. in 2018 from the Université Paris-Saclay (prepared at Université Paris-Sud) under the supervision of Dr. Roland Grappin and Dr. Filippo Pantellini.  During his thesis he has been author and co-author of scientific papers published in The Astrophysical Journal, Solar Physics and Il nuovo cimento. He now works at the department of Surface and Plasma Science of Charles University (Czech Republic) as a postdoctoral fellow.

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