Influences of accreting primordial black holes on the global 21 cm signal in the dark ages

@inproceedings{Yang2021InfluencesOA,
  title={Influences of accreting primordial black holes on the global 21 cm signal in the dark ages},
  author={Yupeng Yang},
  year={2021}
}
Baryonic matter can be accreted onto primordial back holes (PBHs) formed in the early Universe. The radiation from accreting PBHs is capable of altering the evolution of the intergalactic medium (IGM), leaving marks on the global 21 cm signal in the dark ages. For accreting PBHs with mass MPBH = 10 (10) M⊙ and mass fraction fPBH = 10 (10), the brightness temperature deviation ∆δTb reaches ∼ 18 (26) mK at redshift z ∼ 90 (ν ∼ 16 MHz), and the gradient of the brightness temperature dδTb/d… 

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