Selected Topics in Cosmic Ray Physics

Abstract

The search for the origin of cosmic rays is as active as ever, mainly driven by new insights provided by recent pieces of observation. Much effort is being channelled in putting the so called supernova paradigm for the origin of galactic cosmic rays on firmer grounds, while at the highest energies we are trying to understand the observed cosmic ray spectra and mass composition and relating them to potential sources of extragalactic cosmic rays. Interestingly, a topic that has acquired a dignity of its own is the investigation of the transition region between the galactic and extragalactic components, once associated with the ankle and now increasingly thought to be taking place at somewhat lower energies. Here we summarize recent developments in the observation and understanding of galactic and extragalactic cosmic rays and we discuss the implications of such findings for the modelling of the transition between the two.

Solicited review paper to be published in the volume 'Multiple Messengers and Challenges in Astroparticle Physics', GSSI-Springer book series, Springer

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• Simulations and Theory of Ion Injection at Non-relativistic Collisionless Shocks
• Cluster Magnetic Fields from Galactic Outflows
• A dip in the UHECR spectrum and the transition from galactic to extragalactic cosmic rays
• The baryon fraction of LambdaCDM haloes
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• Charged particle diffusion in isotropic random magnetic fields
• Solution to the cosmic ray anisotropy problem
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• Corrected Table for the Parametric Coefficients for the Optical Depth of the Universe to Gamma-rays at Various Redshifts
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• Interpretation of the cosmic ray positron and antiproton fluxes
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• The Compton-Getting effect on ultra-high energy cosmic rays of cosmological origin
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• Identifying Nearby UHECR Accelerators using UHE (and VHE) Photons

Cited by in corpus (5)

• Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
• Measurement of the cosmic-ray energy spectrum above $2.5\times 10^{18}$ eV using the Pierre Auger Observatory
• Impact of transport modelling on the ${}^{60}$Fe abundance inside Galactic cosmic ray sources
• Modeling the Optical Cherenkov Signals by Cosmic Ray Extensive Air Showers Directly Observed from Sub-Orbital and Orbital Altitudes
• Constraints on the AGN flares as sources of ultra-high energy cosmic rays from the Fermi-LAT observations