Irradiated asymmetric Friedmann branes

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We consider a Friedmann brane moving in a bulk impregnated with radiation. The set-up is strongly asymmetric, with only one black hole in the bulk. The radiation emitted by this left bulk black hole can be reflected, absorbed or transmitted through the brane. Radiation pressure accelerates the brane, behaving as dark energy. Absorption however generates a competing effect: the brane becomes heavier and gravitational attraction increases. We analyse the model numerically, assuming a total absorption on the brane for k ≤ 1. We conclude that due to the two competing effects, in this asymmetric scenario the Hawking radiation from the bulk black hole is not able to change the recollapsing fate of this brane-world universe. We show that for light branes and early times the radiation pressure is the dominant effect. In contrast, for heavy branes the self-gravity of the absorbed radiation is a much stronger effect. We find the critical value of the initial energy density for which these two effects roughly cancel each other.

Original languageEnglish
Article number022
JournalJournal of Cosmology and Astroparticle Physics
Issue number1
DOIs
Publication statusPublished - Jan 1 2006

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radiation pressure
radiation
dark energy
attraction
flux density
universe
gravitation

Keywords

  • Cosmological applications of theories with extra dimensions
  • Cosmology with extra dimensions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Irradiated asymmetric Friedmann branes. / Gergely, L.; Keresztes, Z.

In: Journal of Cosmology and Astroparticle Physics, No. 1, 022, 01.01.2006.

Research output: Contribution to journalArticle

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