Ultrahigh energy cosmic rays as heavy nuclei from cluster accretion shocks

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

Large-scale accretion shocks around massive clusters of galaxies, generically expected in hierarchical scenarios of cosmological structure formation, are shown to be potential sources of the observed ultrahigh energy cosmic rays (UHECRs) by accelerating a mixture of heavy nuclei including the iron group elements. Current observations can be explained if the source composition at injection for the heavier nuclei is somewhat enhanced from simple expectations for the accreting gas. The proposed picture should be testable by current and upcoming facilities in the near future through characteristic features in the UHECR spectrum, composition and anisotropy. The associated X-ray and gamma-ray signatures are also briefly discussed.
4 pages, 4 figures, Proceedings of the 30th ICRC, Merida, Mexico, 2007

Keywords

Astrophysics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/141641

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.1027
 http://arxiv.org/abs/0711.1027

Collections

arXiv