Anomaly in the cosmic-ray energy spectrum at GeV_TeV energies

24th European Cosmic Ray Symposium

Thoudam, Satyendra^1 ; Hörandel, Jörg R.^1,2

Department of Astrophysics, IMAPP, Radboud University Nijmegen, Nijmegen

6500 GL, Netherlands^1

Nikhef, Science Park Amsterdam, Amsterdam

1098 XG, Netherlands^2

关键词: Cosmic ray energy spectrum;    Energy spectra;    Measurements of;    Re-acceleration;    Supernova remnants;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/632/1/012026/pdf
DOI  :  10.1088/1742-6596/632/1/012026

来源: IOP

【 摘 要 】

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.