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4 papers · 2 filters
Present and Future Gamma-Ray Probes of the Cygnus OB2 Environment
Luis A. Anchordoqui, Haim Goldberg, Russell D. Moore +3
The MAGIC Collaboration has provided new observational data pertaining to the TeV J2032+4130 gamma-ray source (within the Cygnus OB2 region), for energies E_gamma >400 GeV. It is t…
Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
The Pierre Auger Collaboration, J. Abraham, P. Abreu +458
From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (a…
Ion dynamics and acceleration in relativistic shocks
S. F. Martins, R. A. Fonseca, L. O. Silva +1
Ab-initio numerical study of collisionless shocks in electron-ion unmagnetized plasmas is performed with fully relativistic particle in cell simulations. The main properties of the…
Limit on the diffuse flux of ultra-high energy tau neutrinos with the surface detector of the Pierre Auger Observatory
The Pierre Auger Collaboration
Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming may interact…