Background of radio photons from primordial black holes

@inproceedings{Mittal2021BackgroundOR,
  title={Background of radio photons from primordial black holes},
  author={Shikhar Mittal and Girish Kulkarni},
  year={2021}
}
We compute the isotropic radiation background due to Hawking emission from primordial black holes (PBHs), and examine if this background is a viable option in explaining the excess radiowave background observed by the ARCADE2 and LWA1 experiments at . 1GHz. We find that even under the extreme assumption that all of the dark matter is in the form of PBHs, the radio brightness temperature induced by Hawking evaporation of PBHs is O(10−46)K, highly subdominant compared to the cosmic microwave… 

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