Constraints on accreting primordial black holes with the global 21-cm signal
نویسندگان
چکیده
We investigate the effect of accreting primordial black holes (PBHs) on thermal history intergalactic medium (IGM), including accretion baryonic matter and dark particles. The variations IGM caused by PBHs will result in changes global 21-cm signal cosmic dawn. Based detection EDGES, requiring differential brightness temperature, e.g., $\delta T_{21} \lesssim -100~(-50)~\rm mK$, we obtain upper limits abundance for mass range $10\lesssim M_{\rm PBH} 10^{4}~M_{\odot}$. Compared with previous works, are stronger PBH}\lesssim 50~M_{\odot}$.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.104.063528