Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse

Details Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse

2008-11-10

arxiv.org/abs/0811.1452v2

Class.Quant.Grav.26:235001,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 7 figures, the present version is updated with some changes and two new appendix. Accepted for pubblication in Class

Scientific paper

10.1088/0264-9381/26/23/235001

Following on after two previous papers discussing the formation of primordial black holes in the early universe, we present here results from an in-depth investigation of the extent to which primordial black hole formation in the radiative era can be considered as an example of the critical collapse phenomenon. We focus on initial supra-horizon-scale perturbations of a type which could have come from inflation, with only a growing component and no decaying component. In order to study perturbations with amplitudes extremely close to the supposed critical limit, we have modified our previous computer code with the introduction of an adaptive mesh refinement scheme. This has allowed us to follow black hole formation from perturbations whose amplitudes are up to eight orders of magnitude closer to the threshold than we could do before. We find that scaling-law behaviour continues down to the smallest black hole masses that we are able to follow and we see no evidence of shock production such as has been reported in some previous studies and which led there to a breaking of the scaling-law behaviour at small black-hole masses. We attribute this difference to the different initial conditions used. In addition to the scaling law, we also present other features of the results which are characteristic of critical collapse in this context.

Affiliated with

Also associated with

No associations

Rating

Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-724693