Ultra High Energy Cosmic Rays: propagation in the Galaxy and anisotropy

Abstract

We considered propagation of Ultra High Energy Cosmic Rays (UHECR) through the galaxy. We investigated models with sources of UHECR distributed in the same way as Cold Dark Matter (CDM) in a self-consistent way, taking into account both extra-galactic and Galactic contributions. Using a very simple toy model of galactic magnetic field we showed that in the case of galactic origin of UHECRs the anisotropy can reach considerable values. In the case of extragalactic UHECRs origin the anisotropy appears to be non-vanishing only for electron and photon components due to synchrotron losses, but it hardly can be reassured. The reason is an extremely low flux of UHE electrons and a too low level of gamma-ray anisotropy.

13 pages, 6 figures, published version

References in corpus (6)

• Origin and Propagation of Extremely High Energy Cosmic Rays
• Ultra-high energy cosmic rays without GZK cutoff
• Ultra-High Energy Cosmic Rays, Superheavy Long-Living Particles, and Matter Creation after Inflation
• Cosmic Necklaces and Ultrahigh Energy Cosmic Rays
• Correlation function of ultra-high energy cosmic rays favors point sources
• Galactic Anisotropy as Signature of ``Top-Down'' Mechanisms of Ultra-High Energy Cosmic Rays

Cited by in corpus (27)

• Ultra-High Energy Neutrino Fluxes and Their Constraints
• Ultra-High Energy Neutrino Fluxes: New Constraints and Implications
• Evidence for a connection between the gamma-ray and the highest energy cosmic-ray emissions by BL Lacertae objects
• Ultra-High Energy Cosmic Rays from Neutrino Emitting Acceleration Sources?
• Which blazars are neutrino loud?
• Gamma-Ray Constraints on Maximum Cosmogenic Neutrino Fluxes and UHECR Source Evolution Models
• Analytic calculations of the spectra of ultra-high energy cosmic ray nuclei. I. The case of CMB radiation
• Cosmic Ray Extremely Distributed Observatory
• Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux
• Analytic calculations of the spectra of ultra high energy cosmic ray nuclei. II. The general case of background radiation
• Sensitivity of cosmic-ray experiments to ultra-high-energy photons: reconstruction of the spectrum and limits on the superheavy dark matter
• Large scale extragalactic jets powered by very-high energy gamma rays
• The aperture for UHE tau neutrinos of the Auger fluorescence detector using a Digital Elevation Map
• GZK Photons Above 10 EeV
• Does Galactic Magnetic Field Disturb the Correlation of the Highest Energy Cosmic Rays with their Sources?
• On the cross correlation between the arrival direction of ultra-high energy cosmic rays, BL Lacertae, and EGRET detections: A new way to identify EGRET sources?
• New hadrons as ultra-high energy cosmic rays
• Global anisotropy of arrival directions of ultra-high-energy cosmic rays: capabilities of space-based detectors
• The Enigma of the Highest Energy Particles of Nature
• Composition of UHECR and the Pierre Auger Observatory Spectrum
• Ultra High Energy Neutrinos in the Mediterranean: detecting nu_tau and nu_mu with a km^3 Telescope
• Towards a model of population of astrophysical sources of ultra-high-energy cosmic rays
• Superheavy dark matter as UHECR source versus the SUGAR data
• Observable spectral and angular distributions of $\gamma$-rays from extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme TeV blazars
• Probing Physics at Extreme Energies with Cosmic Ultra-High Energy Radiation
• The Relevance of Mediterranean Neutrino Telescope Sites on Earth-skimming tau neutrino detection
• GZK photons as UHECR above 10${}^{19}$ eV