The GALPROP Cosmic-ray Propagation and Non-thermal Emissions Framework: Release v57

Kavli Affiliate: Troy A. Porter

| First 5 Authors: Troy A. Porter, Gudlaugur Johannesson, Igor V. Moskalenko, ,

| Summary:

The past decade has brought impressive advances in astrophysics of cosmic
rays (CRs) and multi-wavelength astronomy — thanks to the new instrumentation
launched into space and built on the ground. Understanding the astrophysical
backgrounds to better precision than the observed data is vital in moving to
this new territory. The state-of-the-art CR propagation code called GALPROP is
designed to address exactly this challenge. Having 25 years of development
behind it, the GALPROP framework has become a de-facto standard in astrophysics
of CRs, diffuse photon emissions (radio- to gamma-rays), and searches for new
physics. GALPROP uses information from astronomy, particle physics, and nuclear
physics to predict CRs and their associated emissions self-consistently,
providing a unifying modelling framework. The range of its physical validity
covers 18 orders of magnitude in energy, from sub-keV to PeV energies for
particles and from micro-eV to PeV energies for photons. The framework and the
datasets are public and are extensively used by many experimental
collaborations, and by thousands of individual researchers worldwide for
interpretation of their data and for making predictions. This paper details the
latest release of the GALPROP framework, further developments of its initially
auxiliary datasets that grew into independent studies of the Galactic structure
— distributions of gas, dust, radiation and magnetic fields — as well as the
extension of its modelling capabilities. Example applications included with the
distribution illustrating usage of the new features are also described.

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