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Threshold of Primordial Black Hole Formation in Nonspherical Collapse

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

Chul-Moon Yoo , Tomohiro Harada , Hirotada Okawa This is my paper
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keywords formationthresholdamplitudeblackellipticityholeperturbationsprimordial
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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 2 Pith papers

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 of 10

    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.

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

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    Shape dispersion around the average peak profile is a genuine statistical ingredient: rare deformed curvature profiles can dominate primordial black hole formation when the power spectrum is broad or non-Gaussianity i...

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