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arXiv · 2201.04059

Axion-photon multimessenger astronomy with giant flares

Javier De Miguel·Chiko Otani
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Abstract

We treat prospects for multimessenger astronomy with giant flares (GFs), a rare transient event featured by magnetars that can be as luminous as a hundred of the brightest supernovae ever observed. The beamed photons could correlate with an axion counterpart via resonant conversion in the magnetosphere. In a realistic parameter space, we find that the sensitivity limit to galactic GFs for currently viable experiments is $\mathrm{g}_{\phi \gamma}\!\gtrsim\!\mathrm{several}\!\times\!10^{-13}$ GeV$^{-1}$ \& $\mathrm{g}_{\phi e}\!\gtrsim\!\mathrm{few}\!\times\!10^{-12}$. We rule out the compatibility of axion flares with the recent XENON1T excess only due to the time persistence of the signal.

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Javier De Miguel, Chiko Otani. 2022-01-11. Axion-photon multimessenger astronomy with giant flares. https://doi.org/10.1103/physrevd.106.l041302

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