Uncovering axion-like particles in supernova gamma-ray spectra

Abstract

A future Galactic Supernova (SN) explosion can lead to a gamma-ray signal induced by ultralight Axion-Like Particles (ALPs) thermally produced in the SN core and converted into high-energy photons in the Galactic magnetic field. The detection of such a signal is in the reach of the Large Area Telescope aboard the \emph{Fermi} Gamma-Ray Space Telescope. The observation of gamma-ray emission from a future SN has a sensitivity to $g_{a\gamma }\gtrsim 4\times 10^{-13}$ GeV${}^{-1}$ for a SN at fiducial distance of $10$ kpc and would allow us to reconstruct the ALP-photon coupling within a factor of $\sim 2$, mainly due to the uncertainties on the modeling of the Galactic magnetic field.

17 pages, 8 figures. v2: 18 pages, 8 figures. Minor changes to match the published version

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Cited by in corpus (7)

• Supernova axions convert to gamma-rays in magnetic fields of progenitor stars
• Axion Astrophysics
• Supernova limits on 'QCD axion-like particles'
• Probing protoneutron stars with gamma-ray axionscopes
• Probing axion-like particles with multimessenger observations of neutron star mergers
• Fresh look at the diffuse ALP background from supernovae
• Unveiling axion signals in galactic supernovae with future MeV telescopes