Cosmic rays above the 2nd knee from clusters of galaxies

Kohta Murase, Susumu Inoue, Katsuaki Asano

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In clusters of galaxies, accretion and merger shocks are potential accelerators of high energy protons, as well as intracluster active galactic nuclei. We discuss the possibility that protons from cluster shocks make a significant contribution to the observed cosmic rays in the energy range between the second knee at ∼1017.5 eV and the ankle at ∼10 18.5 eV. The accompanying neutrino and gamma-ray signals could be detectable by upcoming telescopes such as IceCube/KM3Net and CTA, providing a test of this scenario as well as a probe of cosmic-ray confinement properties in clusters.

Original languageEnglish (US)
Pages (from-to)1609-1614
Number of pages6
JournalInternational Journal of Modern Physics D
Issue number10
StatePublished - Oct 1 2009

All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


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