Threshold of Primordial Black Hole Formation in Nonspherical Collapse
General Relativity and Quantum Cosmology
2023-02-15 v3 Cosmology and Nongalactic Astrophysics
Abstract
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.
Keywords
Cite
@article{arxiv.2004.01042,
title = {Threshold of Primordial Black Hole Formation in Nonspherical Collapse},
author = {Chul-Moon Yoo and Tomohiro Harada and Hirotada Okawa},
journal= {arXiv preprint arXiv:2004.01042},
year = {2023}
}
Comments
Two-column, 5 pages, 8 figures, minor corrections