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

Kavli Affiliate: Igor V. Moskalenko

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

| Summary:

The past decade has brought impressive advances in the astrophysics of cosmic
rays (CRs) and multiwavelength astronomy, thanks to the new instrumentation
launched into space and built on the ground. Modern technologies employed by
those instruments provide measurements with unmatched precision, enabling
searches for subtle signatures of dark matter (DM) and new physics.
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 the 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 and updated cross sections, further developments of its initially
auxiliary datasets for models of the interstellar medium 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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