Cosmic microwave background constraints on primordial black hole dark matter

Daniel Aloni, Kfir Blum, Raphael Flauger

Research output: Contribution to journalArticlepeer-review

Abstract

We revisit cosmic microwave background (CMB) constraints on primordial black hole dark matter. Spectral distortion limits from COBE/FIRAS do not impose a relevant constraint. Planck CMB anisotropy power spectra imply that primordial black holes with (BH)-B-m greater than or similar to 5M(circle dot) are disfavored. However, this is susceptible to sizeable uncertainties due to the treatment of the black hole accretion process. These constraints are weaker than those quoted in earlier literature for the same observables.
Original languageEnglish
Article number017
Number of pages7
JournalJournal of Cosmology and Astroparticle Physics
Issue number5
DOIs
StatePublished - May 2017

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