# Radio detection of cosmic rays with the Auger Engineering Radio Array

## TL;DR

The paper discusses the Auger Engineering Radio Array (AERA), the largest cosmic-ray radio detector, which enhances cosmic ray measurements and aids in energy scale validation and mass composition analysis.

## Contribution

It presents the design, deployment, and initial results of AERA, demonstrating the effectiveness of radio detection in cosmic ray studies.

## Key findings

- AERA successfully detects cosmic rays in the 10^17 to 10^18 eV range.
- Radio detection provides valuable data for energy calibration of cosmic-ray observatories.
- AERA's measurements support mass-composition analysis of cosmic rays.

## Abstract

The Auger Engineering Radio Array (AERA) complements the Pierre Auger Observatory with 150 radio-antenna stations measuring in the frequency range from 30 to 80 MHz. With an instrumented area of 17 km$^2$, the array constitutes the largest cosmic-ray radio detector built to date, allowing us to do multi-hybrid measurements of cosmic rays in the energy range of 10$^{17}$ eV up to several 10$^{18}$ eV. We give an overview of AERA results and discuss the significance of radio detection for the validation of the energy scale of cosmic-ray detectors as well as for mass-composition measurements.