On the luminosity-redshift relation in brane-worlds with cosmological constant

Abstract

In this paper we calculate the luminosity distance - redshift relation for a special type of flat Friedmann brane with cosmological constant. This special case is singled out by its simplicity, the luminosity distance being given in terms of elementary functions. We compare our analytical result with the expresssion of the luminosity distance for the flat Friedmann-Lemaitre-Robertson-Walker (FLRW) universe and discuss the differences.

7 pages, to appear in the Proceedings of the FIKUT4 Conference, Publications of the Astronomy Department of Eötvös University, PADEU vol. 17 (2006)