Speaker
Description
Clarifying origins and acceleration mechanisms of the most energetic particles in the universe has been the 100-year endeavor, being one of the most intriguing mysteries in an interdisciplinary research among astroparticle physics, high-energy physics and nuclear physics. Since ultrahigh-energy cosmic rays (UHECRs) are deflected less strongly by the Galactic and extra-galactic magnetic fields due to their enormous kinetic energies, their arrival directions would be correlated with their origins. A next-generation “astronomy” using UHECRs is hence a potentially viable probe to uncover mysteries of extremely energetic phenomena in the nearby universe. In this talk, I will give an introduction of cosmic-ray physics, detection techniques and the latest results of the two giant observatories in operation; Telescope Array experiment and Pierre Auger Observatory including their on-going upgrades. I will also discuss a possible source scenario of UHECR produced in binary neutron star mergers.
