Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band
Using detailed Monte Carlo simulations we have characterized the features of the radio emission of inclined air showers in the Ultra-High Frequency band (300 MHz - 3 GHz). The Fourier-spectrum of the radiation is shown to have a sizable intensity well into the GHz frequency range. The emission is ma...
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ftdatacite:10.48550/arxiv.1208.0951 2023-05-15T13:42:19+02:00 Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band Alvarez-Muñiz, Jaime Carvalho, Washington R. Romero-Wolf, Andrés Tueros, Matías Zas, Enrique 2012 https://dx.doi.org/10.48550/arxiv.1208.0951 https://arxiv.org/abs/1208.0951 unknown arXiv https://dx.doi.org/10.1103/physrevd.86.123007 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences article-journal Article ScholarlyArticle Text 2012 ftdatacite https://doi.org/10.48550/arxiv.1208.0951 https://doi.org/10.1103/physrevd.86.123007 2022-04-01T13:39:17Z Using detailed Monte Carlo simulations we have characterized the features of the radio emission of inclined air showers in the Ultra-High Frequency band (300 MHz - 3 GHz). The Fourier-spectrum of the radiation is shown to have a sizable intensity well into the GHz frequency range. The emission is mainly due to transverse currents induced by the geomagnetic field and to the excess charge produced by the Askaryan effect. At these frequencies only a significantly reduced volume of the shower around the axis contributes coherently to the signal observed on the ground. The size of the coherently emitting volume depends on frequency, shower geometry and observer position, and is interpreted in terms of the relative time delays. At ground level, the maximum emission at high frequencies is concentrated in an elliptical ring-like region around the intersection of a Cherenkov cone with its vertex at shower maximum and the ground. The frequency spectrum of inclined showers when observed at positions that view shower maximum in the Cherenkov direction, is shown to be in broad agreement with the pulses detected by the Antarctic Impulsive Transient Antenna (ANITA) experiment, making the interpretation that they are due to Ultra-High Energy Cosmic Ray atmospheric showers consistent with our simulations. These results are also of great importance for experiments aiming to detect molecular bremsstrahlung radiation in the GHz range as they present an important background for its detection. : 8 pages, 8 figures Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
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High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences |
spellingShingle |
High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences Alvarez-Muñiz, Jaime Carvalho, Washington R. Romero-Wolf, Andrés Tueros, Matías Zas, Enrique Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
topic_facet |
High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences |
description |
Using detailed Monte Carlo simulations we have characterized the features of the radio emission of inclined air showers in the Ultra-High Frequency band (300 MHz - 3 GHz). The Fourier-spectrum of the radiation is shown to have a sizable intensity well into the GHz frequency range. The emission is mainly due to transverse currents induced by the geomagnetic field and to the excess charge produced by the Askaryan effect. At these frequencies only a significantly reduced volume of the shower around the axis contributes coherently to the signal observed on the ground. The size of the coherently emitting volume depends on frequency, shower geometry and observer position, and is interpreted in terms of the relative time delays. At ground level, the maximum emission at high frequencies is concentrated in an elliptical ring-like region around the intersection of a Cherenkov cone with its vertex at shower maximum and the ground. The frequency spectrum of inclined showers when observed at positions that view shower maximum in the Cherenkov direction, is shown to be in broad agreement with the pulses detected by the Antarctic Impulsive Transient Antenna (ANITA) experiment, making the interpretation that they are due to Ultra-High Energy Cosmic Ray atmospheric showers consistent with our simulations. These results are also of great importance for experiments aiming to detect molecular bremsstrahlung radiation in the GHz range as they present an important background for its detection. : 8 pages, 8 figures |
format |
Text |
author |
Alvarez-Muñiz, Jaime Carvalho, Washington R. Romero-Wolf, Andrés Tueros, Matías Zas, Enrique |
author_facet |
Alvarez-Muñiz, Jaime Carvalho, Washington R. Romero-Wolf, Andrés Tueros, Matías Zas, Enrique |
author_sort |
Alvarez-Muñiz, Jaime |
title |
Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
title_short |
Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
title_full |
Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
title_fullStr |
Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
title_full_unstemmed |
Coherent Radiation from Extensive Air Showers in the Ultra-High Frequency Band |
title_sort |
coherent radiation from extensive air showers in the ultra-high frequency band |
publisher |
arXiv |
publishDate |
2012 |
url |
https://dx.doi.org/10.48550/arxiv.1208.0951 https://arxiv.org/abs/1208.0951 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1103/physrevd.86.123007 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1208.0951 https://doi.org/10.1103/physrevd.86.123007 |
_version_ |
1766166398582652928 |