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arxiv 2004.01042 v3 pith:CVQVMVFZ submitted 2020-04-01 gr-qc astro-ph.CO

Threshold of Primordial Black Hole Formation in Nonspherical Collapse

classification gr-qc astro-ph.CO
keywords formationthresholdamplitudeblackellipticityholeperturbationsprimordial
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perform (3+1)-dimensional simulations of primordial black hole (PBH) formation starting from the spheroidal super-horizon perturbations. We investigate how the ellipticity (prolateness or oblateness) affects the threshold of PBH formation in terms of the peak amplitude of curvature perturbation. We find that, in the case of the radiation-dominated universe, the effect of ellipticity on the threshold is negligibly small for the large amplitude of perturbations expected for PBH formation.

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Cited by 1 Pith paper

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

  1. The statistics of curvature-profile dispersion in primordial black hole formation

    astro-ph.CO 2026-07 conditional novelty 7.0

    Rare coherent shape deformations of primordial curvature profiles can dominate primordial black hole abundance by lowering the collapse threshold enough to overcome their Gaussian statistical cost.