| Constraints on primordial black holes by distortions of the cosmic microwave background (2008) | |||||||||||||
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| The possible influence of primordial black hole (PBH) evaporations on cosmic microwave backgrounds (CMB) is investigated. The spectrum distortions of CMB from the blackbody spectrum are described by the chemical potential μ and the Compton parameter y. From COBE/FIRAS limits on μ and y, the powerlaw index n of primordial density fluctuations and the mass fraction of PBHs β are constrained by employing the peak theory for the formation process of PBHs. Constraints set here are n. PHYSICAL REVIEW D. v.78, n.2, 2008, p.023004-1-023004-10 | |||||||||||||
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