EDP Sciences
Free access
Volume 422, Number 2, August I 2004
Page(s) 401 - 405
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20040187

A&A 422, 401-405 (2004)
DOI: 10.1051/0004-6361:20040187

The Dyer-Roeder relation in a universe with particle production

M. de Campos1 and J. A. Souza2

1  Physics Department, UFRR, Campus do Paricarãna, Boa Vista, RR., Brasil
    e-mail: campos@dfis.ufrr.br
2  UFF Physics Institute, Av. Litorânea s/n, Niterói, RJ., Brasil
    e-mail: joseuff@bol.com.br

(Received 16 September 2002 / Accepted 23 March 2004 )

We have obtained analytical exact solutions of the Dyer-Roeder equation in a cosmological model where creation of particles occurs at the expense of the gravitational field. We discuss the influences of inhomogeneities in the path of a light beam on the apparent diameter of astrophysical objects and consider both redshift independent and redshift dependent distributions of the inhomogeneities.

Key words: cosmology: miscellaneous -- cosmology: theory

© ESO 2004