Cosmic-ray propagation with DRAGON2: I. numerical solver and astrophysical ingredients

We present version 2 of the DRAGON code designed for computing realistic predictions of the CR densities in the Galaxy. The code numerically solves the interstellar CR transport equation (including inhomogeneous and anisotropic diffusion, either in space and momentum, advective transport and energy...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2017-02, Vol.2017 (2), p.15-15
Main Authors: Evoli, Carmelo, Gaggero, Daniele, Vittino, Andrea, Bernardo, Giuseppe Di, Mauro, Mattia Di, Ligorini, Arianna, Ullio, Piero, Grasso, Dario
Format: Article
Language:English
Subjects:
ACCURACY
ANALYTICAL SOLUTION
ANISOTROPY
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
COSMIC RADIATION
COSMIC RAY PROPAGATION
DENSITY
DIFFUSION
ENERGY LOSSES
GALAXIES
SPACE
TRANSPORT THEORY
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Summary:We present version 2 of the DRAGON code designed for computing realistic predictions of the CR densities in the Galaxy. The code numerically solves the interstellar CR transport equation (including inhomogeneous and anisotropic diffusion, either in space and momentum, advective transport and energy losses), under realistic conditions. The new version includes an updated numerical solver and several models for the astrophysical ingredients involved in the transport equation. Improvements in the accuracy of the numerical solution are proved against analytical solutions and in reference diffusion scenarios. The novel features implemented in the code allow to simulate the diverse scenarios proposed to reproduce the most recent measurements of local and diffuse CR fluxes, going beyond the limitations of the homogeneous galactic transport paradigm. To this end, several applications using DRAGON2 are presented as well. This new version facilitates the users to include their own physical models by means of a modular C++ structure.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2017/02/015