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It has been recently argued [1-3] that there is a strong component of thediffuse far-ultraviolet (FUV) background which is hard to explain byconventional physics in terms of the dust-scattered starlight. We propose thatthis excess in FUV radiation might be result of the dark matter annihilationevents within the so-called axion quark nugget (AQN) dark matter model, whichwas originally invented for completely different purpose to explain theobserved similarity between the dark and the visible components in theUniverse, i.e. $\Omega_{\rm DM}\sim \Omega_{\rm visible}$. We support thisproposal by demonstrating that intensity and the spectral features of the AQNinduced emissions are consistent with the corresponding characteristics of theobserved excess of the FUV radiation. If the future studies confirm thepuzzling characteristics observed in [1-3] it might unlock a much more deeperand fundamental problem of modern cosmology-- it may reveal the nature of thedark matter.

The mysterious diffuse UV radiation and Axion Quark Nugget dark matter model