A1 Refereed original research article in a scientific journal

Anisotropies of solar energetic electrons in the MeV range measured with Solar Orbiter/EPD/HET




AuthorsFleth S, Kuehl P, Kollhoff A, Wimmer-Schweingruber RF, Heber B, Rodríguez-Pacheco J, Dresing N

PublisherEDP SCIENCES S A

Publication year2023

JournalAstronomy and Astrophysics

Journal acronymASTRON ASTROPHYS

Article number A58

Volume676

Number of pages7

ISSN0004-6361

eISSN1432-0746

DOIhttps://doi.org/10.1051/0004-6361/202345909

Web address https://doi.org/10.1051/0004-6361/202345909

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/180749766


Abstract

Aims. This study analyses relativistic electron measurements obtained by the High Energy Telescope (HET) aboard Solar Orbiter in the energy range from 200 keV to above 10 MeV. Caveats of these measurements are discussed. The purpose of this study is to analyse anisotropies of relativistic solar energetic electrons utilising the different viewing directions of HET.

Methods. We identified time periods of interest, that is, those with enhanced electron flux due to a significant solar component, and composed a list of these time periods, including additional observations such as maximum energy and flux as well as the first-order anistropy.

Results. This study provides an overview of HET measurements of MeV electrons and a list of time periods of enhanced flux of relativistic solar electrons, 21 in total. For the first time with Solar Orbiter/EPD/HET, the anisotropies of high-energy electrons have been measured. Specifically, we find three time periods with significant anisotropy above 1 MeV within 0.5 au.


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Last updated on 2024-26-11 at 13:59