Monte Carlo Study of Cosmic-Ray Propagation in the Galaxy and Diffuse Gamma-Ray Production

TL;DR

This paper uses a 3D Monte Carlo simulation to study cosmic-ray propagation and resulting diffuse gamma-ray emission in the Galaxy, providing insights into spatial distributions and source variability.

Contribution

It introduces a novel 3D Monte Carlo approach to model cosmic-ray propagation and gamma-ray production in the Galaxy.

Findings

Cosmic-ray distributions vary with spatial scale and source variability.

Diffuse gamma-ray emission is quantitatively evaluated during propagation.

Preliminary results highlight the importance of source distribution in gamma-ray modeling.

Abstract

This work presents preliminary results for the time-dependent cosmic-ray propagation in the Galaxy by a fully 3-dimensional Monte Carlo simulation. The distribution of cosmic-rays (both protons and helium nuclei) in the Galaxy is studied on various spatial scales for both constant and variable cosmic-ray sources. The continuous diffuse gamma-ray emission produced by cosmic-rays during the propagation is evaluated.