Particles are accelerated in cosmic sites probably under conditions very different from those at terrestrial particle accelerator laboratories. Nevertheless, specific experiments which explore plasma conditions and stimulated particle acceleration carry significant potential to illuminate some aspects of the cosmic particle acceleration process. Here we summarize what we have learned about cosm...

Abstract Blazars are potential sources of cosmic-ray acceleration up to ultrahigh energies ( E ≳ 10 18 eV). For an efficient injection from blazars, pγ collisions with extragalactic background light (EBL) and cosmic microwave (CMB) can produce neutrino spectra peaks near PeV EeV energies, respectively. In this work, we analyze the contribution these neutrinos diffuse measured by IceCube observa...

The 23 February 1956 ground level enhancement of the solar cosmic ray intensity (GLE05) is the most famous among the proton events observed since 1942. But we do not have a great deal of information on this event due to the absence of solar wind and interplanetary magnetic field measurements at that time. Furthermore, there were no X-Ray or gamma observations and the information on the associat...

geomagnetic field is a one of the candidates for creation of anisotropy in azimuth distribution of extensive air showers over the entered cosmic rays to the atmosphere. here we present the question: is there any azimuth anisotropy flux in the upper level of the atmosphere due to the geomagnetic field over the entered cosmic-rays? the obtained answer is: yes. this investigation showed an agreeme...

We explore the potential of an artificial neural network (ANN) based method intelligence to probe propagation cosmic $\gamma$-ray photons in extragalactic Universe. The journey $\gamma$-rays emitted from a distant source like blazar observer at Earth is impeded by absorption through interaction with background light (EBL), leading electron-positron pair production. This process dominates for ga...

The past decade has brought impressive advances in the astrophysics of cosmic rays (CRs) and multiwavelength astronomy, thanks to new instrumentation launched into space built on ground. Modern technologies employed by those instruments provide measurements with unmatched precision, enabling searches for subtle signatures dark matter (DM) physics. Understanding astrophysical backgrounds better ...