4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
The Proceedings of SAIP2016 published on 24 December 2017
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A Multi-frequency analysis of dark matter annihilation interpretations of recent anti-particle and gamma-ray excesses in cosmic structures.

Presented by Mr. Geoff BECK on 5 Jul 2016 from 10:00 to 10:20
Type: Oral Presentation
Session: Astrophysics (1)
Track: Track D1 - Astrophysics


Annihilation of the supersymmetric neutralino dark matter has consequences across the frequency spectrum, from radio to gamma-rays. Using the sensitivity projections for the Square Kilometre Array (SKA), Cherenkov Telescope Array (CTA) and ASTRO-H Satellite, we determine the detection prospects for neutralino models compatible with FERMI observations of the galactic centre as well as those consistent with the AMS-2/Pamela anti-proton excess. We also examine the consequences of recent gamma-ray excesses observed in the Reticulum 2 dwarf galaxy which throw a dark matter interpretation of the excess into doubt. We demonstrate that both the SKA and ASTRO-H have great potential to probe the radio/X-ray emissions from neutralino annihilation, identifying spectral characteristics containing information about the neutralino mass and annihilation channel. Thus, multi-frequency observation with the next generation of experiments will allow for unprecedented sensitivity to the neutralino parameter space as well as offsetting the individual weaknesses of each observation mode.






Prof Sergio Colafrancesco, sergio.colafrancesco@wits.ac.za, University of the Witwatersrand






Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: 5A

Primary authors