Threshold of primordial black hole formation in nonspherical collapse

Chul Moon Yoo, Tomohiro Harada, Hirotada Okawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We perform (3+1)-dimensional simulations of primordial black hole (PBH) formation starting from the spheroidal superhorizon 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 large amplitude of perturbations expected for PBH formation.

Original languageEnglish
Article number043526
JournalPhysical Review D
Issue number4
Publication statusPublished - 2020 Aug 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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