Density perturbations in braneworld cosmology and primordial black holes

Details Density perturbations in braneworld cosmology and primordial black holes Density perturbations in braneworld cosmology and primordial black holes

2010-12-06

arxiv.org/abs/1012.1199v1

Phys.Rev.D83:023516,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

12 pages, 8 figures

Scientific paper

10.1103/PhysRevD.83.023516

We study, by numerical methods, the time evolution of scalar perturbations in radiation era of Randall-Sundrum braneworld cosmology. Our results confirm an existence of the enhancement of perturbation amplitudes (near horizon crossing), discovered recently. We suggest the approximate solution of equations of the perturbation theory in the high energy regime, which predicts that the enhancement factor is asymptotically constant, as a function of scale. We discuss the application of this result for the problem of primordial black hole production in braneworld cosmology.

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