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arXiv · 1510.02580

Galactic cosmic ray propagation models using Picard

Ralf Kissmann·Olaf Reimer·Andrew W. Strong
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Abstract

We present results obtained from our newly developed Galactic cosmic-ray transport code PICARD, that solves the cosmic-ray transport equation. This code allows for the computation of cosmic-ray spectra and the resulting gamma-ray emission. Relying on contemporary numerical solvers allows for efficient computation of models with deca-parsec resolution. PICARD can handle locally anisotropic spatial diffusion acknowledging a full diffusion tensor. We used this framework to investigate the transition from axisymmetric to spiral-arm cosmic-ray source distributions. Wherever possible we compare model predictions with constraining observables in cosmic-ray astrophysics.

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Ralf Kissmann, Olaf Reimer, Andrew W. Strong. 2015-10-09. Galactic cosmic ray propagation models using Picard. https://arxiv.org/abs/1510.02580

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