Scientific article
Open access

Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays

ContributorsAMS Collaboration
Published inPhysical review letters, vol. 130, no. 16, 161001
Publication date2023
First online date2023-04-17

We present the precision measurements of 11 years of daily cosmic electron fluxes in the rigidity interval from 1.00 to 41.9 GV based on 2.0×10^8 electrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The electron fluxes exhibit variations on multiple timescales. Recurrent electron flux variations with periods of 27 days, 13.5 days, and 9 days are observed. We find that the electron fluxes show distinctly different time variations from the proton fluxes. Remarkably, a hysteresis between the electron flux and the proton flux is observed with a significance of greater than 6σ at rigidities below 8.5 GV. Furthermore, significant structures in the electron-proton hysteresis are observed corresponding to sharp structures in both fluxes. This continuous daily electron data provide unique input to the understanding of the charge sign dependence of cosmic rays over an 11-year solar cycle.

  • Electron: flux
  • Cosmic radiation: galaxy
  • Electron: spectrum
  • P: flux
  • Structure
  • Satellite
  • Magnetic spectrometer
  • Electron p
  • Solar
  • AMS
Research group
Citation (ISO format)
AMS Collaboration. Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays. In: Physical review letters, 2023, vol. 130, n° 16, p. 161001. doi: 10.1103/PhysRevLett.130.161001
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Article (Published version)
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ISSN of the journal0031-9007

Technical informations

Creation05/04/2023 8:13:05 AM
First validation05/10/2023 12:13:28 PM
Update time05/10/2023 12:13:28 PM
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