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Primordial Black Holes

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arxiv 2502.15279 v1 pith:TS4FYBH7 submitted 2025-02-21 astro-ph.CO gr-qchep-phhep-th

Primordial Black Holes

classification astro-ph.CO gr-qchep-phhep-th
keywords blackdescribeearlyemphasisevidenceholespbhsprimordial
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this chapter we first describe the early history of primordial black hole (PBH) research. We then discuss their possible formation mechanisms, including critical collapse from inflationary fluctuations and various types of phase transition. We next describe the numerous constraints on the number density of PBHs from various quantum and astrophysical processes. This was the main focus of research until recently but there is currently a shift of emphasis to the search for evidence for PBHs. We end by discussing this evidence, with particular emphasis on their role as dark matter candidates, sources of gravitational waves and seeds for supermassive black holes and early cosmic structures.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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  2. Primordial black hole in Lorentz-violating theories: Insights from Bumblebee gravity

    gr-qc 2026-07 conditional novelty 6.0

    Bumblebee gravity enhances primordial black hole abundance through three mechanisms, but the model harbors a ghost instability and a tachyonic instability that make it cosmologically unviable.

  3. Stochastic constant-roll inflation beyond the hilltop with the spectral method

    astro-ph.CO 2026-06 unverdicted novelty 6.0

    Spectral solution of the Fokker-Planck operator for hilltop constant-roll inflation shows rare crossing trajectories dominate the mean, so the median yields a coarse-grained ΔN distribution whose exponential tail flat...

  4. Quantum Critical Collapse Abhors a Naked Singularity

    gr-qc 2025-09 unverdicted novelty 6.0

    One-loop quantum vacuum polarization in Einstein-scalar critical collapse generates a horizon and finite mass gap, enforcing black hole formation even under arbitrary fine-tuning.

  5. Impact of Primordial Black Hole population on 21 cm observables at high redshift

    astro-ph.CO 2026-04 unverdicted novelty 5.0

    X-ray heating from primordial black holes assumed to seed high-redshift AGNs shallows the global 21-cm absorption signal and suppresses its power amplitude at cosmic dawn, with strong dependence on the PBH mass function.

  6. Regular black holes with gravitational self-energy as dark matter

    gr-qc 2025-09 unverdicted novelty 5.0

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