Large Scale Magnetic Fields and the Number of Cosmic Ray Sources above 10^(19) eV

Abstract

We present numerical simulations for the two-point correlation function and the angular power spectrum of nucleons above 10^{19} injected by a discrete distribution of sources following a simple approximation to the profile of the Local Supercluster. We develop a method to constrain the number of sources necessary to reproduce the observed sky distribution of ultra-high energy cosmic rays, as a function of the strength of the large scale cosmic magnetic fields in the Local Supercluster. While for fields B < 0.05 micro Gauss the Supercluster source distribution is inconsistent with the data for any number of sources, fields of strength B~0.3 micro Gauss could reproduce the observed data with a number of sources around 10.

10 latex pages, 17 postscript figures included

References in corpus (4)

• Lensing of ultra-high energy cosmic rays in turbulent magnetic fields
• Correlation function of ultra-high energy cosmic rays favors point sources
• Centaurus A as the Source of ultra-high energy cosmic rays?
• A lower bound on the local extragalactic magnetic field

Cited by in corpus (24)

• The Astrophysics of Ultrahigh Energy Cosmic Rays
• Ultra-High Energy Cosmic Ray Probes of Large Scale Structure and Magnetic Fields
• Astrophysical Origins of Ultrahigh Energy Cosmic Rays
• Ultra-High Energy Cosmic Rays in a Structured and Magnetized Universe
• Fragmentation functions in SUSY QCD and UHECR spectra produced in top-down models
• The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure
• The Small Scale Anisotropies, the Spectrum and the Sources of Ultra High Energy Cosmic Rays
• The highest-energy cosmic rays
• Ultrahigh Energy Nuclei Propagation in a Structured, Magnetized Universe
• Cosmic Magnetic Fields and Their Influence on Ultra-High Energy Cosmic Ray Propagation
• Astrophysical magnetic field reconstruction and spectroscopy with ultra high energy cosmic rays
• New hadrons as ultra-high energy cosmic rays
• Arrival Distribution of Ultra-High Energy Cosmic Rays: Prospects for the Future
• Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory
• A New Method for Calculating Arrival Distribution of Ultra-High Energy Cosmic Rays above 10^19 eV with Modifications by the Galactic Magnetic Field
• Nearby quasar remnants and ultra-high energy cosmic rays
• Estimates of multipolar coefficients to search for cosmic ray anisotropies with non-uniform or partial sky coverage
• Full-Sky Search for Ultra High Energy Cosmic Ray Anisotropies
• Angular Power Spectrum Estimation of Cosmic Ray Anisotropies with Full or Partial Sky Coverage
• A closer look at the spectrum and small scale anisotropies of UHECRs
• Anisotropy at the end of the cosmic ray spectrum?
• Statistics of cluster multiplicity and the nature of UHE cosmic ray sources
• Small Scale Anisotropy Predictions for the Auger Observatory
• Propagation of Ultra-High Energy Cosmic Rays in Extragalactic Magnetic Fields