At energies exceeding even the reach of the Pierre Auger Observatory, cosmic rays and even ultra-high energy neutrinos can be detected using the surface of the Moon. The impacts of these particles in the surface of Moon initiate particle showers in the lunar regolith. Electromagnetic showers in a dense medium have an excess of electrons and will therefore emit coherent Cherenkov radiation, known as the Askarian effect. The emitted radiation can be detected on Earth with sensitive radio telescopes. When operating in the 100-200~MHz frequency range the highest sensitivity is reached. Observations, as part of the NuMoon project, are ongoing at the Westerbork Synthesis Radio Telescope and are part of the cosmic ray Key science project for the LOFAR radio telescope.
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|Last modified:||27 June 2018 11.50 a.m.|