Observing Dark Matter via the Gyromagnetic Faraday Effect

Details Observing Dark Matter via the Gyromagnetic Faraday Effect Observing Dark Matter via the Gyromagnetic Faraday Effect

2006-11-21

arxiv.org/abs/astro-ph/0611684v3

Phys.Rev.Lett.100:041303,2008

Astronomy and Astrophysics

Astrophysics

4 pages, RevTeX; numerical error fixed, some conclusions modified

Scientific paper

10.1103/PhysRevLett.100.041303

If dark matter consists of cold, neutral particles with a non-zero magnetic moment, then, in the presence of an external magnetic field, a measurable gyromagnetic Faraday effect becomes possible. This enables direct constraints on the nature and distribution of such dark matter through detailed measurements of the polarization and temperature of the cosmic microwave background radiation.

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