Primordial black holes and Co-Decaying dark matter

Julian Georg, Brandon Melcher, Scott Watson

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Models of Co-Decaying dark matter lead to an early matter dominated epoch-prior to BBN-which results in an enhancement of the growth of dark matter substructure. If these primordial structures collapse further they can form primordial black holes providing an additional dark matter candidate. We derive the mass fraction in these black holes (which is not monochromatic) and consider observational constraints on how much of the dark matter could be comprised in these relics. We find that in many cases they can be a significant fraction of the dark matter. Interestingly, the masses of these black holes can be near the solar-mass range providing a new mechanism for producing black holes like those recently detected by LIGO.

Original languageEnglish (US)
Article number014
JournalJournal of Cosmology and Astroparticle Physics
Issue number11
StatePublished - 2019


  • cosmology of theories beyond the SM
  • dark matter theory
  • primordial black holes

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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