Evidence for Radio Detection of Extensive Air Showers Induced by Ultra High Energy Cosmic Rays

D. Ardouin (1) , A. Bellétoile (1) , Didier Charrier (1) , Richard Dallier (1) , L. Denis (2) , P. Eschstruth (3) , Thierry Gousset (1) , Ferid Haddad (1) , J. Lamblin (1) , Pascal Lautridou (1) , A. Lecacheux (4) , D. Monnier-Ragaigne (3) , O. Ravel (1) , A. Rahmani (1)

1 SUBATECH - Laboratoire SUBATECH Nantes
2 USN - Unité Scientifique de la Station de Nançay
3 LAL - Laboratoire de l'Accélérateur Linéaire
4 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique

Firm evidence for a radio emission counterpart of cosmic ray air showers is presented. By the use of an antenna array set up in coincidence with ground particle detectors, we find a collection of events for which both time and arrival direction coincidences between particle and radio signals are observed. The counting rate corresponds to shower energies $\gtrsim 5\times 10^{16}$ eV. These results open overwhelming perspectives to complete existing detection methods for the observation of ultra high-energy cosmic rays.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

D. Ardouin, A. Bellétoile, Didier Charrier, Richard Dallier, L. Denis, et al.. Evidence for Radio Detection of Extensive Air Showers Induced by Ultra High Energy Cosmic Rays. 2005. ⟨in2p3-00025068⟩