Journal
PHYSICAL REVIEW D
Volume 96, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.023514
Keywords
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Funding
- Estonian Research Council [IUT23-6, PUT799]
- EU through the ERDF CoE program [TK133]
- U.K. Science and Technology Facilities Council [ST/J001546/1]
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We revisit the cosmological and astrophysical constraints on the fraction of the dark matter in primordial black holes (PBHs) with an extended mass function. We consider a variety of mass functions, all of which are described by three parameters: a characteristic mass and width and a dark matter fraction. Various observations then impose constraints on the dark matter fraction as a function of the first two parameters. We show how these constraints relate to those for a monochromatic mass function, demonstrating that they usually become more stringent in the extended case than the monochromatic one. Considering only the well-established bounds, and neglecting the ones that depend on additional astrophysical assumptions, we find that there are three mass windows, around 5 x 10(-16)M(circle dot), 2 x 10(-14)M(circle dot) and 25-100M(circle dot), where PBHs can constitute all the dark matter. However, if one includes all the bounds, PBHs can only constitute of order 10% of the dark matter.
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