• Media type: E-Article
  • Title: Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
  • Contributor: Aguilar, M. [Author]; Cavasonza, L. Ali [Author]; Barrin, L. [Author]; Hsieh, T. H. [Author]; Huang, H. [Author]; Huang, Z. C. [Author]; Huh, C. [Author]; Incagli, M. [Author]; Ionica, M. [Author]; Jang, W. Y. [Author]; Jia, Yi [Author]; Jinchi, H. [Author]; Kang, S. C. [Author]; Bartoloni, A. [Author]; Kanishev, K. [Author]; Khiali, B. [Author]; Kim, G. N. [Author]; Kim, K. S. [Author]; Kirn, Th. [Author]; Konak, C. [Author]; Kounina, O. [Author]; Kounine, A. [Author]; Koutsenko, V. [Author]; Kulemzin, A. [Author]; [...]
  • imprint: APS, 2018
  • Published in: Physical review letters 121(5), 051102 (2018). doi:10.1103/PhysRevLett.121.051102
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevLett.121.051102
  • ISSN: 1092-0145; 1079-7114; 0031-9007
  • Origination:
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  • Description: We present high-statistics, precision measurements of the detailed time and energy dependence of the primary cosmic-ray electron flux and positron flux over 79 Bartels rotations from May 2011 to May 2017 in the energy range from 1 to 50 GeV. For the first time, the charge-sign dependent modulation during solar maximum has been investigated in detail by leptons alone. Based on 23.5×106 events, we report the observation of short-term structures on the timescale of months coincident in both the electron flux and the positron flux. These structures are not visible in the e+/e− flux ratio. The precision measurements across the solar polarity reversal show that the ratio exhibits a smooth transition over 830±30 days from one value to another. The midpoint of the transition shows an energy dependent delay relative to the reversal and changes by 260±30 days from 1 to 6 GeV.
  • Access State: Open Access