A Search for the Origin of Ultrahigh Energy Cosmic Rays

Details A Search for the Origin of Ultrahigh Energy Cosmic Rays A Search for the Origin of Ultrahigh Energy Cosmic Rays

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.2032h&link_type=abstract

Chandra Proposal ID #07800665

Physics

Chandra Proposal Id #07800665

Scientific paper

Ultra-High Energy Cosmic Rays (UHECRs) are the most energetic particles we know of in the Universe, and their source is a forty-year-old mystery. We have recently discovered a cluster of five UHECRs which are consistent with a single source location. Examination of this location in the SDSS reveals a local void out to 200 Mpc bounded by a pair of merging galaxy clusters. The local absence of matter suggests a low intergalactic magnetic field which could explain the small deflections required for a CR cluster to be detected on Earth. The merging clusters may either contain the CR source, or produce CRs directly in magnetic shocks in the interaction region. We propose to raster this region with ACIS-I in order to illuminate the UHECR enigma.

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