A new parametrization for the radio emission of air showers applied to LOFAR data
IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
2 Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
3 Nikhef, Science Park Amsterdam, 1098 XG Amsterdam, The Netherlands
4 Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands
5 KVI-CART, University Groningen, P.O. Box 72, 9700 AB Groningen
6 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
7 Interuniversity Institute for High-Energy, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels Belgium
8 Department of Physics and Electrical Engineering, Lineeuniversitetet, 35195 Vaxjo Sweden
9 DESY, platanenallee 6, 15738 Zeuthen Germany
10 Humboldt-Universitat zu Berlin, Institut fur Physik, Newtonstr. 15, 12489 Berlin, Germany
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Published online: 24 September 2019
The energy and mass composition of cosmic rays influence how the energy density of the radio emission of air showers is distributed on the ground. A precise description of the radio profiles can, therefore, be used to reconstruct the properties of the primary cosmic rays. Here, such a description is presented, using a separate treatment of the two radio-emission mechanisms, the geomagnetic effect and the charge excess effect. The model is parametrized as a function that depends only on the shower parameters, allowing for a precise reconstruction of the properties of the primary cosmic rays. This model is applied to cosmic-ray events measured with LOFAR and it is capable of reconstructing the properties of air showers correctly.
© The Authors, published by EDP Sciences, 2019
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