CRPropa 3.3: Toward a Unified Multi-Messenger Framework from GeV to ZeV Energies
Paper in proceeding, 2025
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.
Author
S. Aerdker
RAPP Center
Ruhr-Universität Bochum
R. Alves Batista
Institut d 'Astrophysique de Paris
Pierre and Marie Curie University (UPMC)
Julia Tjus
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
RAPP Center
Ruhr-Universität Bochum
G. Di Marco
Universidad Autonoma de Madrid (UAM)
Spanish National Research Council (CSIC)
J. Dörner
RAPP Center
Ruhr-Universität Bochum
Karl Heinz Kampert
Bergische Universität Wuppertal
RAPP Center
L. Merten
RAPP Center
Ruhr-Universität Bochum
Leonel Morejon
Bergische Universität Wuppertal
Sebastien Muller
Chalmers, Space, Earth and Environment, Onsala Space Observatory
P. Reichherzer
University of Oxford
A. Saveliev
Immanuel Kant Baltic Federal University
Moscow State University
Leander Schlegel
Ruhr-Universität Bochum
RAPP Center
G. Sigl
University of Hamburg
A. van Vliet
Khalifa University
Proceedings of Science
18248039 (eISSN)
Vol. 501 964
39th International Cosmic Ray Conference, ICRC 2025
Geneva, Switzerland,
Geneva, Switzerland,
Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology
DOI
10.22323/1.501.0964