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Close encounters of the primordial kind: a new observable for primordial black holes as dark matter

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arxiv 2312.17217 v3 pith:ZO4W2ABY submitted 2023-12-28 astro-ph.CO astro-ph.EPhep-ph

classification astro-ph.COastro-ph.EPhep-ph
keywords primordialsolarsystemabundanceasteroid-massblackclosedark
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Primordial black holes (PBHs) remain a viable dark matter candidate in the asteroid-mass range. We point out that in this scenario, the PBH abundance would be large enough for at least one object to cross through the inner Solar System per decade. Since Solar System ephemerides are modeled and measured to extremely high precision, such close encounters could produce detectable perturbations to orbital trajectories with characteristic features. We evaluate this possibility with a suite of simple Solar System simulations, and we argue that the abundance of asteroid-mass PBHs can plausibly be probed by existing and near-future data.

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Forward citations

Cited by 2 Pith papers

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

  1. Gravity Probe-DM: The Gravitational Laboratory for Dark Matter

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Proposal for a heliocentric two-spacecraft ranging mission (Gravity Probe-DM) to measure the tidal field of the Sun's dark-matter focusing wake, with raw range scales of ~0.6 pm to ~15 nm.

  2. Gravitational wave signatures of primordial black hole accretion during early matter domination

    hep-ph 2025-05 conditional novelty 6.0 of 10

    PBHs that form in a radiation era and accrete during an early matter era could produce a two-peak GW background detectable by LISA or BBO for asteroid-mass PBHs as all of dark matter.

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