On the short term modulation of cosmic rays by high-speed streams at the Pierre Auger surface array detectors

13 Mar 2020 de Oliveira M. N. Augusto C. R. A. Navia C. E. Nepomuceno A. A.

We present an analysis of the short-term modulation (one rotation of Bartels-27 days) of the galactic cosmic rays (GCR) by the solar wind, based on the cosmic ray rates observed by the Pierre Auger Observatory (PAO) on their surface detectors in scaler mode. The incidence of GCR with energies below $\sim$ 50 TeV, at the top of the atmosphere, produces more than 90\% of the secondary particles registered at ground level, i.e., they are subject to solar modulation... (read more)

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Categories


  • HIGH ENERGY ASTROPHYSICAL PHENOMENA
  • SPACE PHYSICS