Work

Threshold of primordial black hole formation in nonspherical collapse

Year: 2020

Type: article

Abstract: 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.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.102.043526

Authors: Chul-Moon Yoo, Tomohiro Harada, Hirotada Okawa

Institutions: Nagoya University, Rikkyo University, Waseda University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Waseda University, Japan Society for the Promotion of Science

Awards: Theoretical study of the mass and angular momentum distribution of primordial black holes, Theoretical prediction for the spin of primordial black holes, G8128419955