A method for high precision reconstruction of air shower Xmax using two-dimensional radio intensity profiles

Abstract

The mass composition of cosmic rays contains important clues about their origin. Accurate measurements are needed to resolve long-standing issues such as the transition from Galactic to extragalactic origin, and the nature of the cutoff observed at the highest energies. Composition can be studied by measuring the atmospheric depth of the shower maximum Xmax of air showers generated by high-energy cosmic rays hitting the Earth's atmosphere. We present a new method to reconstruct Xmax based on radio measurements. The radio emission mechanism of air showers is a complex process that creates an asymmetric intensity pattern on the ground. The shape of this pattern strongly depends on the longitudinal development of the shower. We reconstruct Xmax by fitting two-dimensional intensity profiles, simulated with CoREAS, to data from the LOFAR radio telescope. In the dense LOFAR core, air showers are detected by hundreds of antennas simultaneously. The simulations fit the data very well, indicating that the radiation mechanism is now well-understood. The typical uncertainty on the reconstruction of Xmax for LOFAR showers is 17 g/cm^2.

12 pages, 10 figures, submitted to Phys. Rev. D

References in corpus (8)

• Hadronic Multiparticle Production at Ultra-High Energies and Extensive Air Showers
• A Macroscopic Description of Coherent Geo-Magnetic Radiation from Cosmic Ray Air Showers
• Ankle-like Feature in the Energy Spectrum of Light Elements of Cosmic Rays Observed with KASCADE-Grande
• Dependence of geosynchrotron radio emission on the energy and depth of maximum of cosmic ray showers
• Reconstruction of the energy and depth of maximum of cosmic-ray air-showers from LOPES radio measurements
• The shape of the radio wavefront of extensive air showers as measured with LOFAR
• Experimental evidence for the sensitivity of the air-shower radio signal to the longitudinal shower development
• The air shower maximum probed by Cherenkov effects from radio emission

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