Speaker
Eloy de Jong
(King's College London)
Description
I will talk about studying the formation of black holes from subhorizon and superhorizon perturbations in a matter dominated universe with 3+1D numerical relativity simulations. We find that there are two primary mechanisms of formation depending on the initial perturbation's mass and geometry -- via direct collapse of the initial overdensity and via post-collapse accretion of the ambient dark matter. We find that the duration of the collapse process is roughly one Hubble time, that the PBH mass at formation time is around 1% of the Hubble mass and that the subsequent accretion rates are high. I will also comment on the influence of non-sphericity on the collapse.
Author
Eloy de Jong
(King's College London)
