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Article Dans Une Revue Bulletin of the American Astronomical Society Année : 2022

The Persistent Mystery of Collisionless Shocks

Katherine Goodrich
Steven Schwartz
Lynn Wilson III
Ian Cohen
Amir Caspi
Keith Smith
  • Fonction : Auteur
Randall Rose
  • Fonction : Auteur
Phyllis Whittlesey
Ferdinand Plaschke
Jasper Halekas
George Hospodarsky
James Burch
Imogen Gingell
Li-Jen Chen
  • Fonction : Auteur
Alessandro Retino
Yuri Khotyaintev
  • Fonction : Auteur

Résumé

Collisionless shock waves are one of the main forms of energy conversion in space plasmas. They can directly or indirectly drive other universal plasma processes such as magnetic reconnection, turbulence, particle acceleration and wave phenomena. Collisionless shocks employ a myriad of kinetic plasma mechanisms to convert the kinetic energy of supersonic flows in space to other forms of energy (e.g., thermal plasma, energetic particles, or Poynting flux) in order for the flow to pass an immovable obstacle. The partitioning of energy downstream of collisionless shocks is not well understood, nor are the processes which perform energy conversion. While we, as the heliophysics community, have collected an abundance of observations of the terrestrial bow shock, instrument and mission-level limitations have made it impossible to quantify this partition, to establish the physics within the shock layer responsible for it, and to understand its dependence on upstream conditions. This paper stresses the need for the first ever spacecraft mission specifically designed and dedicated to the observation of both the terrestrial bow shock as well as Interplanetary shocks in the solar wind.
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Dates et versions

hal-04289453 , version 1 (21-11-2023)

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Katherine Goodrich, Steven Schwartz, Lynn Wilson III, Ian Cohen, Amir Caspi, et al.. The Persistent Mystery of Collisionless Shocks. Bulletin of the American Astronomical Society, 2022, Heliophysics 2024 Decadal Whitepapers, 55 (3), ⟨10.3847/25c2cfeb.9053575b⟩. ⟨hal-04289453⟩
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