A ~60-minute microlensing event is interpreted via Bayesian modeling as a ~0.03 Earth-mass primordial black hole in the Milky Way dark-matter halo.
Updated constraints on asteroid-mass primordial black holes as dark matter , volume=
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AMPM survey detects one microlensing candidate in LMC data and constrains up to 30% of Galactic primordial black hole dark matter at 95% C.L. in the asteroid-to-planetary mass range, with peak sensitivity shifted to lunar masses by second-order effects.
Stellar microlensing surveys exclude compact objects between 10^{-11} and 10^4 solar masses from making up all dark matter under standard assumptions.
citing papers explorer
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AMPM II. A Lunar-Mass Primordial Black Hole Microlensing Candidate in the Milky Way Halo
A ~60-minute microlensing event is interpreted via Bayesian modeling as a ~0.03 Earth-mass primordial black hole in the Milky Way dark-matter halo.
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AMPM I. A Targeted Search for Asteroid Mass Primordial Black Hole Microlenses
AMPM survey detects one microlensing candidate in LMC data and constrains up to 30% of Galactic primordial black hole dark matter at 95% C.L. in the asteroid-to-planetary mass range, with peak sensitivity shifted to lunar masses by second-order effects.
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Stellar microlensing surveys as a probe of Primordial Black Holes: status and prospects
Stellar microlensing surveys exclude compact objects between 10^{-11} and 10^4 solar masses from making up all dark matter under standard assumptions.