A search for Extragalactic Sources of Ultrahigh-Energy Cosmic Rays
A.A. Ivanov (for the Yakutsk array group)
TL;DR
This paper investigates potential extragalactic sources of ultrahigh-energy cosmic rays above 4×10^{19} eV, confirming correlations with nearby active galactic nuclei and supporting the GZK effect through data analysis.
Contribution
It identifies classes of active galactic nuclei as probable sources of ultrahigh-energy cosmic rays, based on correlation analysis with cosmic ray arrival directions.
Findings
Correlation between cosmic rays and nearby active galactic nuclei
Confirmation of the GZK effect on ultrahigh-energy cosmic rays
Identification of specific extragalactic source classes
Abstract
Possible extragalactic sources of cosmic rays at energies above 4*10^{19} eV detected with the Yakutsk array are sought. Correlation of the shower arrival directions with objects from Veron's catalog that are located closer than 100 Mpc from the Earth confirms the observations at the Pierre Auger observatory, as well as the Greisen-Zatsepin-Kuzmin effect on ultrahigh-energy cosmic rays. The detailed analysis of the data reveals the classes of objects belonging to the active galactic nuclei that are probable sources of ultrahigh-energy cosmic rays.
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