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Large-scale distribution of arrival directions of cosmic rays detected above 1018 eV at the Pierre Auger Observatory

2012

A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 1018 eV at the Pierre Auger Observatory is presented. This search is performed as a function of both declination and right ascension in several energy ranges above 1018 eV, and reported in terms of dipolar and quadrupolar coefficients. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Assuming that any cosmic-ray anisotropy is dominated by dipole and quadrupole moments in this energy range, upper limits on their amplitudes are derived. These upper limits allow us to test the origin of cosmic rays above 1018 eV from stationary Galactic …

[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Radiación CósmicaAstronomyMilky WayAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesCosmic rayAstrophysicsEXTENSIVE AIR-SHOWERSSURFACE DETECTOR01 natural sciencesGALACTIC MAGNETIC-FIELDSAuger[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]cosmic raysObservatory0103 physical sciencesastroparticle physics; cosmic raysAnisotropy010303 astronomy & astrophysicsGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Ciencias ExactasHigh Energy Astrophysical Phenomena (astro-ph.HE)Astroparticle physicsPhysicsPierre Auger ObservatoryANISOTROPY010308 nuclear & particles physicsAstrophysics::Instrumentation and Methods for AstrophysicsAstronomyFísicaAstronomy and AstrophysicsENERGY-SPECTRUMUltra-High Energy Cosmic Rays Pierre Auger Observatory Large Scale AnisotropiesSpace and Planetary Scienceastroparticle physicsExperimental High Energy PhysicsROTATIONARRAYFísica nuclearAstroparticle physicsRight ascensionAstrophysics - High Energy Astrophysical Phenomena
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