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Francesca Day (DAMTP)

February 20 @ 4:00 pm - 5:00 pm UTC+0

Axions and X-ray polarimetry.

Axions are one of the best motivated extensions to the Standard Model, both solving the strong CP problem and providing a natural dark matter candidate.
X-Ray telescope observations have already placed world leading bounds on the axion-photon coupling by searching for axion-photon interconversion in the magnetic fields of galaxy clusters. However, current X-ray telescopes are unable to exploit one of the most striking features of this effect: only photons polarised parallel to the background magnetic field mix with axions. This leads to distinctive polarisation signatures from astrophysical sources. The next generation of polarising X-ray telescopes could detect these signatures. I will discuss the opportunities and difficulties of detecting axions with X-ray polarimetry.


February 20
4:00 pm - 5:00 pm
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Room 101
2-5 Kirkby Place
Plymouth, PL4 6DT United Kingdom
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