Results on mass composition of cosmic rays as measured with LOFAR

Corstanje A, Buitink S, Falcke H, Hare BM, Hörandel JR, Huege T, Krampah GK, Mitra P, Mulrey K, Nelles A, Pandya H, Rachen JP, Scholten O, ter Veen S, Thoudam S, Trinh G, Winchen T (2022)

Publication Type: Conference contribution

Publication year: 2022

Journal

PoS - Proceedings of Science SISSA

Publisher: Sissa Medialab Srl

Book Volume: 395

Conference Proceedings Title: Proceedings of Science

Event location: Virtual, Berlin, DEU

Abstract

We present an updated analysis of the mass composition of cosmic rays in the energy range of 1016.8 to 1018.3 eV. It is based on measurements with the LOFAR telescope of the depth of shower maximum, Xmax. We review the improvements to the simulation-based reconstruction setup, as well as the selection method to obtain a minimally biased Xmax dataset. Results include estimates of the mean and standard deviation of the Xmax distribution. A statistical analysis at distribution level has been done as well, using a four-component model of light to heavy nuclei. It confirms our previous results showing a significant low-mass fraction in this energy range. The radio technique has advanced enough that multiple observatories are publishing results on Xmax. As the array layouts and methods vary, it is interesting to compare the approaches, in light of the observed differences in the Xmax results. We therefore show additional information on bias tests used in the Xmax reconstruction and sample selection process.

Authors with CRIS profile

Anna Nelles

Involved external institutions

Vrije Universiteit Brussel (VUB) BE Belgium (BE) Radboud University Nijmegen NL Netherlands (NL) Kapteyn Astronomical Institute NL Netherlands (NL) Astron NL Netherlands (NL) Khalifa University of Science, Technology & Research (KUSTAR) / جامعة خليفة AE United Arab Emirates (AE) Can Tho University / Trường Đại học Cần Thơ VN Viet Nam (VN) Max-Planck-Institut für Radioastronomie / Max Planck Institute for Radio Astronomy DE Germany (DE) Deutsches Elektronen-Synchrotron DESY DE Germany (DE)

How to cite

APA:

Corstanje, A., Buitink, S., Falcke, H., Hare, B.M., Hörandel, J.R., Huege, T.,... Winchen, T. (2022). Results on mass composition of cosmic rays as measured with LOFAR. In Proceedings of Science. Virtual, Berlin, DEU: Sissa Medialab Srl.

MLA:

Corstanje, A., et al. "Results on mass composition of cosmic rays as measured with LOFAR." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.

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