Radio emission from the stimulated decay of axion dark matter in the Galaxy

by Dr Ferrer Francesc (Washington University, St Louis, USA)

Tuesday 9 Jan 2024, 12:00 → 13:30 Europe/Madrid

IFAE Seminar Room (Face-to-face Only)

e will describe the full-sky distribution of the radio
emission from the stimulated decay of axions assumed to compose the dark
matter in the Galaxy. Comparing the diffuse emission to the
counterimages of the brightest supernovae remnants we show that for a
cuspy NFW profile, the expected signal from the Galactic center is the
strongest. Nevertheless, the Galactic anti-center provides competitive
constraints that are robust under uncertain assumptions on the dark
matter density in the inner region. The expected signal is within reach
of the Square Kilometer Array for micro-eV mass axions with and
axion-photon coupling $g_{a \gamma} \geq (2-3) \times 10^{-11}$
GeV${}^{-1}$.