Anisotropy expectations for ultra-high-energy cosmic rays with future high-statistics experiments

作者: B. Rouillé d’Orfeuil , D. Allard , C. Lachaud , E. Parizot , C. Blaksley

DOI: 10.1051/0004-6361/201423462

关键词:

摘要: Context. Ultra-high-energy cosmic rays (UHECRs) have attracted a lot of attention in astroparticle physics and high-energy astrophysics, due to their challengingly high energies, ability constrain the physical processes astrophysical parameters most energetic sources universe. Despite very large acceptance, current detectors failed detect significant anisotropies arrival directions, which had been expected lead long-sought identification sources. Some indications about composition UHECRs, may become heavier at highest even called into question possibility that such goal could be achieved foreseeable future. Aims. We investigate potential value new-generation detector, with an exposure increased by one order magnitude, overcome situation make notable progress detecting thus study UHECRs. take as example performances JEM-EUSO assuming uniform full-sky coverage total 300 000 km2 sr yr. Methods. simulated realistic UHECR sky maps for wide range possible scenarios allowed constraints, taking energy losses photo-dissociation UHE protons nuclei account, well deflections intervening magnetic fields. These maps, built both statistics Pierre Auger Observatory statistics, reference, were analysed from point view intrinsic anisotropies, using two-point correlation function. A statistical resulting was performed each scenario, varying source spectrum density exploring set five hundred independent realizations choice parameter set. Results. find are detected next-generation essentially all studied, give precise, quantitative meaning this statement. Conclusions. Our results show gain magnitude would difference compared existing experiments, allow considerable these mysterious particles

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