CRPropa 3.3: Toward a Unified Multi-Messenger Framework from GeV to ZeV Energies

We present CRPropa 3.3, the latest release of the publicly available Monte Carlo framework for simulating the propagation of high-energy particles in astrophysical environments. This version introduces significant extensions that enables multi-messenger studies across a broad energy range, from GeV to ZeV. New features include explicit time tracking, time-dependent advection fields, and support for position-dependent radiation backgrounds, for more realistic simulations of Galactic and extragalactic propagation. Nuclear cross sections have been updated and expanded up to lead (Z=82). We illustrate some of these new features, including acceleration at moving shocks and gamma-ray propagation in the interstellar radiation field. Together, these improvements establish CRPropa 3.3 as a comprehensive tool for modelling cosmic rays, gamma rays, and their secondaries in structured, time-dependent environments, setting the stage for next-generation multi-messenger astrophysics.

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Publication Details

Published
2025-09-23
DOI
https://doi.org/10.22323/1.501.0964
Primary Topic
Particle Detector Development and Performance
Type
article
Field-Weighted Citation Impact
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article

CRPropa 3.3: Toward a Unified Multi-Messenger Framework from GeV to ZeV Energies

G. Sigl, Sophie Aerdker, A. van Vliet, Leander Schlegel et al.
Particle Detector Development and Performance
article

CRPropa 3.3: Toward a Unified Multi-Messenger Framework from GeV to ZeV Energies

G. Sigl, Sophie Aerdker, A. van Vliet, Leander Schlegel, Andrey Saveliev, Rafael Alves Batista, Lukas Merten, Patrick Reichherzer, Julien Dörner, K.‐H. Kampert, J. Becker Tjus, Leonel Morejón, G. Müller, Gaetano Di Marco
article en

Abstract

We present CRPropa 3.3, the latest release of the publicly available Monte Carlo framework for simulating the propagation of high-energy particles in astrophysical environments. This version introduces significant extensions that enables multi-messenger studies across a broad energy range, from GeV to ZeV. New features include explicit time tracking, time-dependent advection fields, and support for position-dependent radiation backgrounds, for more realistic simulations of Galactic and extragalactic propagation. Nuclear cross sections have been updated and expanded up to lead (Z=82). We illustrate some of these new features, including acceleration at moving shocks and gamma-ray propagation in the interstellar radiation field. Together, these improvements establish CRPropa 3.3 as a comprehensive tool for modelling cosmic rays, gamma rays, and their secondaries in structured, time-dependent environments, setting the stage for next-generation multi-messenger astrophysics.

Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Bundesministerium für Bildung und Forschung, Khalifa University of Science, Technology and Research
Openalex Percentile: Top 89%
Particle Detector Development and Performance
DOIOpen Access PDFOpenAlex
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CRPropa 3.3: Toward a Unified Multi-Messenger Framework from GeV to ZeV Energies — G. Sigl, Sophie Aerdker, et al. · (2025) | TGRS Research Map | TGRS