Bounds on the density of sources of ultra-high energy cosmic rays from the Pierre Auger Observatory

Abstract

We derive lower bounds on the density of sources of ultra-high energy cosmic rays from the lack of significant clustering in the arrival directions of the highest energy events detected at the Pierre Auger Observatory. The density of uniformly distributed sources of equal intrinsic intensity was found to be larger than $\sim (0.06-5)\times 10^{-4}$ Mpc${}^{-3}$ at 95% CL, depending on the magnitude of the magnetic deflections. Similar bounds, in the range $(0.2-7)\times 10^{-4}$ Mpc${}^{-3}$, were obtained for sources following the local matter distribution.

25 pages, 6 figures

References in corpus (8)

• Swift BAT Survey of AGN
• CRPropa 2.0 -- a Public Framework for Propagating High Energy Nuclei, Secondary Gamma Rays and Neutrinos
• Search for Anisotropy of Ultra-High Energy Cosmic Rays with the Telescope Array Experiment
• On the ultra-high energy cosmic ray horizon
• The Pierre Auger Observatory II: Studies of Cosmic Ray Composition and Hadronic Interaction models
• Implications to Sources of Ultra-high-energy Cosmic Rays from their Arrival Distribution
• The Pierre Auger Observatory III: Other Astrophysical Observations
• A global autocorrelation study after the first Auger data: impact on the number density of UHECR sources

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