Search for Global Dipole Enhancements in the HiRes-I Monocular Data above 10^{18.5} eV

Abstract

Several proposed source models for Ultra-High Energy Cosmic Rays (UHECRs) consist of dipole distributions oriented towards major astrophysical landmarks such as the galactic center, M87, or Centaurus A. We use a comparison between real data and simulated data to show that the HiRes-I monocular data for energies above 10^{18.5} eV is, in fact, consistent with an isotropic source model. We then explore methods to quantify our sensitivity to dipole source models oriented towards the Galactic Center, M87, and Centaurus A.

arXiv comment17 pages, 31 figures

References in corpus (9)

• Measurement of the Flux of Ultrahigh Energy Cosmic Rays from Monocular Observations by the High Resolution Fly's Eye Experiment
• Cosmic Ray Anisotropy Analysis with a Full-Sky Observatory
• Monocular Measurement of the Spectrum of UHE Cosmic Rays by the FADC Detector of the HiRes Experiment
• Southern Hemisphere Observations of a $10^{18}$eV Cosmic Ray Source Near the Direction of the Galactic Centre
• An Auger test of the Cen A model of highest energy cosmic rays
• Origin of the highest energy cosmic rays observed
• Deducing the Source of Ultrahigh Energy Cosmic Rays
• Using Fractal Dimensionality in the Search for Source Models of Ultra-High Energy Cosmic Rays
• Study of Broad Scale Anisotropy of Cosmic Ray Arrival Directions from $2\times 10^{17}eV$ to $10^{20}eV$ from Fly's Eye Data

Cited by in corpus (10)

• Cosmic Rays from the Knee to the Highest Energies
• A Study of the Composition of Ultra High Energy Cosmic Rays Using the High Resolution Fly's Eye
• Ultrahigh-energy cosmic-ray bounds on nonbirefringent modified-Maxwell theory
• Cosmic Rays: The Second Knee and Beyond
• Observations of Microwave Continuum Emission from Air Shower Plasmas
• Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory
• A Search for Arrival Direction Clustering in the HiRes-I Monocular Data above 10^(19.5) eV
• A new method to search for a cosmic ray dipole anisotropy
• Search for Point-Like Sources of Cosmic Rays with Energies above 10^18.5 eV in the HiRes-I Monocular Data-Set
• The Search for Anisotropy in the Arrival Directions of Ultra-High Energy Cosmic Rays Observed by the High Resolution Fly's Eye Detector in Monocular Mode