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Latest results on the analysis of the radio frequency spectrum emitted by high energy air showers with LOFAR
Radboud Univ Nijmegen, Netherlands.
Radboud Univ Nijmegen, Netherlands.
Vrije Univ Brussel, Belgium.
Radboud Univ Nijmegen, Netherlands.
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2019 (English)In: 8th International Conference on Acoustic and Radio EeV Neutrino Detection Activities (ARENA 2018) / [ed] Riccobene, G Biagi, S Capone, A Distefano, C Piattelli, P, EDP Sciences , 2019, p. 1-3, article id 02013Conference paper, Published paper (Refereed)
Abstract [en]

The LOw Frequency ARay (LOFAR) is a multi-purpose radio antenna array aimed to detect radio signals in the frequency range 10 - 240 MHz, covering a large surface in Northern Europe with a higher density in the Netherlands. Analytical calculations and simulation studies performed in the 2000s indicate a dependence of the radio frequency spectrum on cosmic-ray characteristics. The high number density of radio antennas at the LOFAR core allows to characterise the observed cascade in a detailed way. The radio signal emitted by air showers in the atmosphere has been studied accurately in the 30 - 80 MHz frequency range. The analysis has been conducted on simulated events and on real data detected by LOFAR since 2011. The final aim of this study is to find an independent method to infer information of primary cosmic rays for improving the reconstruction of primary particle parameters. Results show a strong dependence of the frequency spectrum on the distance to the shower axis for both real data and simulations. Furthermore, results show that this method is very sensitive to the precision in reconstructing the position of the shower axis at ground, and to different antenna calibration procedures. A correlation between the frequency spectrum and geometrical distance to the shower maximum development X-max has also been investigated.

Place, publisher, year, edition, pages
EDP Sciences , 2019. p. 1-3, article id 02013
Series
EPJ Web of Conferences, E-ISSN 2100-014X ; 216
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-98768DOI: 10.1051/epjconf/201921602013ISI: 000570244200023Scopus ID: 2-s2.0-85184353466ISBN: 978-2-7598-9080-4 (print)OAI: oai:DiVA.org:lnu-98768DiVA, id: diva2:1498819
Conference
8th International Conference on Acoustic and Radio EeV Neutrino Detection Activities (ARENA), JUN 12-18, 2015, Ist Nazl Fisica Nucl, Lab Nazl Sud, Catania, ITALY
Available from: 2020-11-05 Created: 2020-11-05 Last updated: 2024-02-15Bibliographically approved

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Thoudam, Satyendra

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