Limits on primordial black holes from $\mu$ distortions in cosmic microwave background
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DOI: 10.1103/physrevd.97.043525
Abstract: If primordial black holes (PBHs) form directly from inhomogeneities in the early universe, then the number in the mass range $10^6 -10^9M_{\odot}$ is severely constrained by upper limits to the $\mu$-distortion in the cosmic microwave… read more here.
Keywords: limits primordial; black holes; microwave background; primordial black ... See more keywords