Scientific article
English

Diverse Properties of Electron Forbush Decreases Revealed by the Dark Matter Particle Explorer

ContributorsDAMPE Collaboration
Published inPhysical review letters, vol. 136, no. 10, 101004
First online date2026-03-13
Abstract

The Forbush decrease of cosmic rays is an important probe of the interplanetary environment disturbed by solar activities. In this Letter, we study the properties of eight Forbush decreases' electrons (including positrons) between 2 and 20 GeV from January 2016 to March 2024 with the Dark Matter Particle Explorer. The maximum decrease amplitudes of these events are about 30%-15%, and the amplitudes reduce with energy. The recovery time of these events shows diverse behaviors of their energy dependence. Some of them show strong energy dependence, while some have a nearly constant recovery time. It has been shown that such diverse behaviors could be related to the geometry of the regions of the interplanetary space disturbed by coronal mass ejections, which can be characterized by the combined effect of the coronal mass ejection velocity, angular spread, and ejection direction.

Funding
  • Chinese Academy of Sciences [YSBR-061]
  • National Key Research and Development Program of China [2022YFF0503302]
  • National Natural Science Foundation of China [12220101003]
  • Youth Innovation Promotion Association of the Chinese Academy of Sciences
  • Instituto Nazionale di Fisica Nucleare
  • European Commission - Direct Detection of TeV--PeV Cosmic Rays in Space [851103]
Citation (ISO format)
DAMPE Collaboration. Diverse Properties of Electron Forbush Decreases Revealed by the Dark Matter Particle Explorer. In: Physical review letters, 2026, vol. 136, n° 10, p. 101004. doi: 10.1103/6dyq-9v81
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Identifiers
Additional URL for this publicationhttps://link.aps.org/doi/10.1103/6dyq-9v81
Journal ISSN0031-9007
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