BHL-type post-recombination accretion can raise late three-body PBH merger rates enough for TianQin detections at f~10^{-6} and for LVK limits to bound delayed virialization.
Non-particle dark matter
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abstract
We provide a pedagogical introduction to non-particle dark matter, focused on primordial black holes (PBHs), black holes that may form in the early Universe from large overdensities. First, we outline the key properties of PBHs and how they meet the requirements to be a dark matter candidate. We then overview how PBHs can form, in particular from the collapse of large density perturbations generated by inflation (a proposed period of accelerated expansion in the early Universe). Next, we describe how PBHs can be probed by observations. Finally, we conclude with a summary focused on the key open questions in the field.
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astro-ph.CO 1years
2026 1verdicts
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Effect of post-recombination accretion on primordial binary black hole mergers within virialized dark matter halos
BHL-type post-recombination accretion can raise late three-body PBH merger rates enough for TianQin detections at f~10^{-6} and for LVK limits to bound delayed virialization.