Cosmic rays have been studied for nearly a century. The energy spectrum, origins, and nature of ultra-high energy cosmic-ray particles are questions that have yet to be definitively understood. The Pierre Auger Observatory, located in Mendoza Province, Argentina, is the world's largest detector of ultra-high energy cosmic rays. With an unprecedented amount of data collected, its findings are shedding light on these questions. We report several of the latest results, including studies of the energy spectrum, arrival direction, composition, and limits on photon and neutrino fluxes. New detector technologies which complement the existing surface detector array and fluorescence telescopes will also be discussed.
Refreshments in CW 119 at 4:15 p.m.