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Title: Observation of inclined EeV air showers with the radio detector of the Pierre Auger Observatory

Journal Article · · Journal of Cosmology and Astroparticle Physics
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In this study, with the Auger Engineering Radio Array (AERA) of the Pierre Auger Observatory, we have observed the radio emission from 561 extensive air showers with zenith angles between 60° and 84°. In contrast to air showers with more vertical incidence, these inclined air showers illuminate large ground areas of several km2 with radio signals detectable in the 30 to 80 MHz band. A comparison of the measured radio-signal amplitudes with Monte Carlo simulations of a subset of 50 events for which we reconstruct the energy using the Auger surface detector shows agreement within the uncertainties of the current analysis. As expected for forward-beamed radio emission undergoing no significant absorption or scattering in the atmosphere, the area illuminated by radio signals grows with the zenith angle of the air shower. Inclined air showers with EeV energies are thus measurable with sparse radio-antenna arrays with grid sizes of a km or more. Finally, this is particularly attractive as radio detection provides direct access to the energy in the electromagnetic cascade of an air shower, which in case of inclined air showers is not accessible by arrays of particle detectors on the ground.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Pierre Auger Collaboration
Grant/Contract Number:
AC02-07CH11359; FR02-04ER41300; FG02-99ER41107; SC0011689
OSTI ID:
1463631
Report Number(s):
arXiv:1806.05386; FERMILAB-PUB-18-259; 1677962; TRN: US1902324
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 10; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (14)

The Giant Radio Array for Neutrino Detection (GRAND): Science and design journal August 2019
Radio detection in the multi-messenger context journal January 2019
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors journal April 2019
NuRadioReco: a reconstruction framework for radio neutrino detectors journal June 2019
Open Questions in Cosmic-Ray Research at Ultrahigh Energies journal June 2019
Radio detection in the multi-messenger context text January 2019
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors text January 2019
Radio detection in the multi-messenger context text January 2018
NuRadioReco: a reconstruction framework for radio neutrino detectors text January 2019
Open Questions in Cosmic-Ray Research at Ultrahigh Energies text January 2019
Open Questions in Cosmic-Ray Research at Ultrahigh Energies text January 2019
The Giant Radio Array for Neutrino Detection (GRAND): Science and Design text January 2018
NuRadioReco: A reconstruction framework for radio neutrino detectors text January 2019
Enhancing the cosmic-ray mass sensitivity of air-shower arrays by combining radio and muon detectors text January 2019

Figures / Tables (9)