Loss of coherence and change in emission physics for radio emission from very inclined cosmic-ray air showers
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910418408046592 |
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| author | Chiche, Simon Zhang, Chao Schlüter, Felix Kotera, Kumiko Huege, Tim de Vries, Krijn D. Tueros, Matias Guelfand, Marion |
| author_facet | Chiche, Simon Zhang, Chao Schlüter, Felix Kotera, Kumiko Huege, Tim de Vries, Krijn D. Tueros, Matias Guelfand, Marion |
| contents | Next-generation radio experiments such as the Radio Detector of the upgraded Pierre Auger Observatory and the planned GRAND and BEACON arrays target the detection of ultra-high-energy particle air showers arriving at low elevation angles. These inclined cosmic-ray air showers develop higher in the atmosphere than vertical ones, enhancing magnetic deflections of electrons and positrons inside the cascade. We evidence two novel features in their radio emission: a new polarization pattern, consistent with a geo-synchrotron emission model and a coherence loss of the radio emission, both for showers with zenith angle $θ\gtrsim 65^{\circ}$ and strong enough magnetic field amplitude (typical strength of $B\sim 50\, \rm μT$). Our model is compared with both ZHAireS and CoREAS Monte-Carlo simulations. Our results break the cannonical description of a radio signal made of Askaryan and transverse current emission only, and provide guidelines for the detection and reconstruction strategies of next-generation experiments, including cosmic-ray/neutrino discrimination. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_14541 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Loss of coherence and change in emission physics for radio emission from very inclined cosmic-ray air showers Chiche, Simon Zhang, Chao Schlüter, Felix Kotera, Kumiko Huege, Tim de Vries, Krijn D. Tueros, Matias Guelfand, Marion High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics Next-generation radio experiments such as the Radio Detector of the upgraded Pierre Auger Observatory and the planned GRAND and BEACON arrays target the detection of ultra-high-energy particle air showers arriving at low elevation angles. These inclined cosmic-ray air showers develop higher in the atmosphere than vertical ones, enhancing magnetic deflections of electrons and positrons inside the cascade. We evidence two novel features in their radio emission: a new polarization pattern, consistent with a geo-synchrotron emission model and a coherence loss of the radio emission, both for showers with zenith angle $θ\gtrsim 65^{\circ}$ and strong enough magnetic field amplitude (typical strength of $B\sim 50\, \rm μT$). Our model is compared with both ZHAireS and CoREAS Monte-Carlo simulations. Our results break the cannonical description of a radio signal made of Askaryan and transverse current emission only, and provide guidelines for the detection and reconstruction strategies of next-generation experiments, including cosmic-ray/neutrino discrimination. |
| title | Loss of coherence and change in emission physics for radio emission from very inclined cosmic-ray air showers |
| topic | High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2404.14541 |