![]() Here, I focus on stochasticĪcceleration in the lobes. Other cosmic ray telescopes may be accelerated in the nuclei, jets or lobes of radio galaxies. ![]() Numerous authors have suggested that the ultra-high-energy cosmic rays (UHECR) detected by the Pierre Auger Observatory and Trustingly, the close connection between particle physics andĪstrophysics will contribute in future years to many new interesting Wewill mention the measurement of the diffuse electron and positron Finally, about other possible components, Molecular clouds we will show some results, in connection with cosmic Take place in some supernova remnants in interaction with surrounding Other than that, hadron-hadron interactions are supposed to We will also mention cosmic ray acceleration in galaxyĬlusters. Is explained with accelerated hadrons in interaction with ambient MAGIC has detectedaboutįifty such extragalactic objects we will present some where theemission Galactic nuclei, as blazars and radio galaxies. Sources of high relevanceįor the study of very high energy hadronic interactions are active The energy window between 50 GeV and 30 TeV. Γ ray telescopes, located at La Palma (Canaries), with access to Comment: Submitted to Astroparticle Physics 27 pages, 13 figures (20 panels)Ĭosmic ray interactions can be investigated indirectly in γ rayĪstronomy, with the observation of spectral and morphological features This is compatible with a GZK survival horizon, but only if (a) the Auger energies are underestimated by ~25% and (b) the sudden fall in the energy spectrum is not simply a GZK effect but essentially reflects an energy cut-off in the sources. The sources appear to be mostly within 120 Mpc. The cosmic rays in the Auger sample seem to be scattered by ~3-4 degrees en route, from about 50 Mpc, and in one relatively well probed sky region there may be a 4 degree systematic deflection in a Bz component of the magnetic field in the galactic halo. The efficacy of a 57 EeV cut to select this revelatory (proton) sample of the Auger data may be almost accidental and not robust. Cen A is currently inactive at this energy, as more distant radio galaxies are so prominent. Using the latter, the chance of accidental correlation is found to be well below 1 in 10^5 even without using 3.2 degree windows the correlation with FRI-like radio galaxies within 75 Mpc, listed by Nagar & Matulich (which are in AGN clusters), is separately just as significant and a correlation can also be found in other data at a lower energy. The correlation between the directions of optically-detected AGNs within 75 Mpc and the arrival directions of cosmic rays above 57 EeV detected by the Auger collaboration up to August 2007 is examined using uniform-exposure plots and a form of right ascension resonance which does not require choice of an association window radius.
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