CRPropa 2.0 -- a Public Framework for Propagating High Energy Nuclei, Secondary Gamma Rays and Neutrinos

TL;DR

CRPropa 2.0 is an open-source simulation framework for modeling the propagation of ultra-high energy nuclei, gamma rays, and neutrinos through extragalactic space, enabling multi-messenger astrophysics studies.

Contribution

It introduces a comprehensive, publicly available tool that simulates particle interactions and propagation of nuclei, gamma rays, and neutrinos in structured magnetic fields and photon backgrounds.

Findings

Demonstrates applications in extragalactic ultra-high energy radiation physics.

Enables multi-messenger connection studies between primary nuclei and secondary particles.

Supports energy range 6×10^16 eV to A×10^22 eV for nuclei.

Abstract

Version 2.0 of CRPropa is public software to model the extra-galactic propagation of ultra-high energy nuclei of atomic number Z<26 through structured magnetic fields and ambient photon backgrounds taking into account all relevant particle interactions. CRPropa covers the energy range 6*10^16 < E/eV < A*10^22 where A is the nuclear mass number. CRPropa can also be used to track secondary \gamma-rays and neutrinos which allows the study of their link with the charged primary nuclei -- the so called multi-messenger connection. After a general introduction we present several sample applications of current interest concerning the physics of extragalactic ultra-high energy radiation.