Threshold of Primordial Black Hole Formation in Nonspherical Collapse

Mar 31, 2020
6 pages
Published in:
  • Phys.Rev.D 102 (2020) 4, 043526,
  • Phys.Rev.D 107 (2023) 4, 049901 (erratum)
  • Published: Aug 28, 2020
    and
  • Published: Feb 3, 2023
e-Print:
Report number:
  • RUP-20-12

Citations per year

2020202120222023202402468101214
Abstract: (APS)
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.
Note:
  • Two-column, 5 pages, 8 figures, minor corrections
  • Cosmology