26-30 July 2021
Europe/Berlin timezone

Axion-Photon Conversion in Magnetospheres: The Role of the Plasma

29 Jul 2021, 09:30


Parallel session talk Dark Matter T03: Dark Matter


Samuel Witte (GRAPPA, U. of Amsterdam)


The most promising indirect search for the existence of axion dark matter uses radio telescopes to look for narrow spectral lines generated in the magnetospheres of neutron stars. Unfortunately, a large list of theoretical uncertainties has prevented this search strategy from being accepted as robust. In this talk I will present a novel end-to-end pipeline that traces individual photon trajectories from their point of genesis in the magnetosphere to asymptotic distances. This method allows one assess many of the outstanding uncertainties, including: (1) do refraction and reflection induce strong inhomogeneous features in the flux, (2) can refraction induce premature axion-photon de-phasing, (3) what is the expected width of the line, (4) does the flux have a strong time-dependence, and (5) can these radio photons be efficiently absorbed.

Email witte.sam@gmail.com
Collaboration / Activity none?
First author Samuel Witte

Primary authors

Samuel Witte (GRAPPA, U. of Amsterdam) Mr Dion Noordhuis (Grappa, U. of Amsterdam) Dr Thomas Edwards ( Oskar Klein Centre for Cosmoparticle Physics) Prof. Christoph Weniger (Grappa, U. of Amsterdam)

Presentation Materials