3 papers
astro-ph.CO2019
PBH in single field inflation: the effect of shape dispersion and non-Gaussianities
Vicente Atal, Judith Cid, Albert Escrivà +1
Primordial black holes (PBHs) may result from high peaks in a random field of cosmological perturbations. In single field inflationary models, such perturbations can be seeded as t…
gr-qc2019
A universal threshold for primordial black hole formation
Albert Escrivà, Cristiano Germani, Ravi K. Sheth
In this letter, we argue and show numerically that the threshold to form primordial black holes from an initial spherically symmetric perturbation is, to an excellent approximation…
gr-qc2019
Simulation of primordial black hole formation using pseudo-spectral methods
Albert Escrivà
In this work we have used for the first time pseudo-spectral methods to perform numerical simulations of spherically symmetric black hole formations on a Friedman-Robertson-Walker…