CRPropa 3.2: a public framework for high-energy astroparticle simulations

TL;DR

CRPropa 3.2 is an advanced, versatile Monte Carlo framework for simulating high-energy particle propagation in the universe, enabling multi-messenger astrophysics with new features and improved performance.

Contribution

The paper introduces CRPropa 3.2, a major update with new capabilities for simulating cosmic-ray acceleration, electromagnetic cascades, and improved magnetic field tracking.

Findings

Enhanced simulation of cosmic-ray acceleration and interactions.

Full Monte Carlo electromagnetic cascade modeling.

Improved performance in magnetic field propagation.

Abstract

CRPropa is a Monte Carlo framework for simulating the propagation of (ultra-) high-energy particles in the Universe, including cosmic rays, gamma rays, electrons, and neutrinos. It covers energies from ZeV down to GeV for gamma rays and electrons, and TeV for cosmic rays and neutrinos, supporting various astrophysical environments such as the surroundings of astrophysical sources, galactic, and extragalactic environments. The newest version, CRPropa 3.2, represents a significant leap forward towards a universal multi-messenger framework, opening up the possibility for many more astrophysical applications. This includes extensions to simulate cosmic-ray acceleration and particle interactions within astrophysical source environments, a full Monte Carlo treatment of electromagnetic cascades, improved ensemble-averaged Galactic propagation, significant performance improvements for cosmic-ray tracking through magnetic fields, and a user-friendly implementation of custom photon fields, among many more enhancements. This contribution will give an overview of the new features and present several applications to cosmic-ray and gamma-ray propagation.