22-30 July 2021
North-West University
Africa/Johannesburg timezone
More Information Coming Soon

Diffusing assumptions in astroparticle physics

27 Jul 2021, 16:15
Potchefstroom Campus (North-West University)

Potchefstroom Campus

North-West University

Oral Presentation Track D1 - Astrophysics Astrophysics


Michael Sarkis (University of the Witwatersrand)


Previous calculations of diffuse radio emissions from dark matter annihilations have made use of Green’s function approximations to solve the diffusive cosmic ray transport equation. Some notable astrophysical code packages, including GALPROP and DRAGON, take a numerical approach to this calculation that involves the use of the Crank-Nicolson finite-differencing scheme. In this work we analyse the physical accuracy of the analytic approximations and directly compare the computational efficiency of the two solution methods. We also incorporate full spatial dependence into the diffusion and energy-loss coefficients, and compare this to the approach of using spatially-averaged values of the magnetic field strength and thermal electron population.

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Primary authors

Michael Sarkis (University of the Witwatersrand) Geoff Beck (University of Witwatersrand)

Presentation Materials

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