Anomaly in the cosmic-ray energy spectrum at GeV-TeV energies

Abstract

Recent measurements of cosmic rays by various experiments have found that the energy spectrum of cosmic rays is harder in the TeV region than at GeV energies. The origin of the spectral hardening is not clearly understood. In this paper, we discuss the possibility that the spectral hardening might be due to the effect of re-acceleration of cosmic rays by weak shocks associated with old supernova remnants in the Galaxy.

6 pages, To appear in the proceedings of the 24th European Cosmic Ray Symposium, 2014, Kiel

References in corpus (10)

• Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
• Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
• Origin of the Cosmic Ray Spectral Hardening
• Spectra of Cosmic Ray Protons and Helium Produced in Supernova Remnants
• The origin of cosmic rays: Explosions of massive stars with magnetic winds and their supernova mechanism
• GeV-TeV cosmic-ray spectral anomaly as due to re-acceleration by weak shocks in the Galaxy
• Cosmic ray production in supernova remnants including reacceleration: the secondary to primary ratio
• Revisiting the hardening of the cosmic-ray energy spectrum at TeV energies
• On the contribution of nearby sources to the observed cosmic-ray nuclei
• A United Model for the cosmic ray energy spectra and anisotropy in the energy range 100 - 100 000 GeV