Communication Dans Un Congrès Année : 2023

Acceleration of relativistic electron beams by a strong interplanetary shock at 1 AU

Immanuel Christopher Jebaraj
  • Fonction : Auteur
Domenico Trotta
  • Fonction : Auteur
Nina Dresing
  • Fonction : Auteur
Andrea Larosa
  • Fonction : Auteur
Oleksiy V. Agapitov
  • Fonction : Auteur
Nicolas Wijsen
  • Fonction : Auteur
Jan Gieseler
  • Fonction : Auteur
Athanasios Kouloumvakos
  • Fonction : Auteur
Andrew P. Dimmock
  • Fonction : Auteur
Christian Palmroos
  • Fonction : Auteur
David Lario
  • Fonction : Auteur
Sebastian Fleth
  • Fonction : Auteur
Patrick Kühl
  • Fonction : Auteur
Alexander Kollhoff
  • Fonction : Auteur
Rami O. Vainio
  • Fonction : Auteur
Yuri Khotyaintsev
  • Fonction : Auteur

Résumé

Collisionless shocks in the heliosphere such as planetary bow shocks and CME-driven shocks play a significant role as particle accelerators. These shocks can be categorized based on their geometry relative to the magnetic field as parallel, perpendicular, or oblique. With a profound impact on the surrounding plasma, shock waves exhibit intricate and dynamic evolution across multiple scales. Of particular interest are the "super-critical" interplanetary traveling shocks and the acceleration of energetic electrons, where understanding remains incomplete due to scale-related challenges and technical complexities. On July 25, 2022, Solar Orbiter encountered the strongest shock so far in its mission and the associated energetic storm particles. The event featured intriguing phenomena, including upstream field-aligned relativistic electron beams, large-scale magnetic field rotations, and a delayed downstream particle flux. Our focus lies on elucidating the role of the large-scale magnetic rotations in shock corrugations and their effects on energetic particles. The observations strongly support a scenario in which the curvatures arising from these corrugations act as the source for the field-aligned relativistic beams of electrons. Further exploitation of the observation such as the peak energy spectra have provided critical insights into the acceleration mechanisms as well as the transport processes close to the origin of the upstream electron beam.

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Dates et versions

insu-04796043 , version 1 (21-11-2024)

Identifiants

Citer

Immanuel Christopher Jebaraj, Domenico Trotta, Nina Dresing, Vladimir Krasnoselskikh, Andrea Larosa, et al.. Acceleration of relativistic electron beams by a strong interplanetary shock at 1 AU. AGU Fall Meeting 2023, Dec 2023, San Francisco, United States. ⟨insu-04796043⟩
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