Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 9: Cosmic rays 2
T 9.3: Talk
Monday, March 4, 2024, 16:30–16:45, Geb. 30.22: Lehmann-HS
Radio emission-mechanism of horizontal air showers measured with AERA at the Pierre Auger Observatory* — •Rukije Uzeiroska for the Pierre-Auger collaboration — Bergische Universität Wuppertal, Wuppertal, Deutschland
The Pierre Auger Observatory is the world’s largest detector measuring ultra high energy cosmic rays.
The Auger Engineering Radio Array (AERA) is
an ensemble of 153 antennas covering an area of 17 km2 and is used to detect the radio emissions from extensive air showers (EAS).
The radio emission consist of two main components: the geomagnetic and the charge-excess emission.
These components can be disentangled by measuring the direction of the electric field vector.
This talk presents current efforts by the Pierre Auger Collaboration to determine the relative contributions of these two processes using the polarization pattern of the antenna stations for events measured with AERA, which helps to understand the development of air showers.
The goal is to develop a reliable and robust analysis for determining the emission ratio a for horizontal EAS.
Furthermore, theoretical expectations for this quantity within CoREAS simulations of horizontal air showers are verified.
The simulations were reconstructed with the analysis framework of the Pierre Auger Observatory, offline.
Comparisons of the simulated results with those already measured by LOFAR show agreement within the expected range of uncertainties.
*Supported by BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A23PX1)
Keywords: Pierre Auger Observatory; radio; radio emission; photon; simulation