Dec 15 – 16, 2022
Centre for Particle Theory, Durham
Europe/London timezone

Can Primordial Black Hole Clusters Evade Microlensing Constraints?

Dec 15, 2022, 3:30 PM
Ph30 (zoom room 2) (Centre for Particle Theory, Durham)

Ph30 (zoom room 2)

Centre for Particle Theory, Durham

Department of Physics Durham University South Road Durham DH1 3LE
Long talk (20 mins) Full Length Talks


Matthew Gorton (University of Nottingham)


Stellar microlensing strongly constrains the fraction of dark matter in compact objects, such as primordial black holes (PBHs). However, PBHs are expected to form clusters, and it has been argued that these constraints are therefore weakened or evaded. I will present a plausible PBH cluster model for the most commonly-studied PBH formation mechanism: the collapse of large curvature perturbations generated by inflation. I will then discuss the impact of these PBH clusters on stellar microlensing constraints.

Type of presentation 20 minute talk
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Please select the most relevant category Astroparticle
Other categories: Primordial Back Holes

Primary author

Matthew Gorton (University of Nottingham)

Presentation materials