A lower bound on the number of cosmic ray events required to measure source catalogue correlations

Marco Dolci, Andrew Romero-Wolf, Stephanie Wissel

Research output: Contribution to journalArticlepeer-review

Abstract

Recent analyses of cosmic ray arrival directions have resulted in evidence for a positive correlation with active galactic nuclei positions that has weak significance against an isotropic source distribution. In this paper, we explore the sample size needed to measure a highly statistically significant correlation to a parent source catalogue. We compare several scenarios for the directional scattering of ultra-high energy cosmic rays given our current knowledge of the galactic and intergalactic magnetic fields. We find significant correlations are possible for a sample of >1000 cosmic ray protons with energies above 60 EeV.

Original languageEnglish (US)
Article number028
JournalJournal of Cosmology and Astroparticle Physics
Volume2016
Issue number10
DOIs
StatePublished - Oct 18 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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