| Issue |
A&A
Volume 382, Number 3, FebruaryII 2002
|
|
|---|---|---|
| Page(s) | 787 - 791 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361:20011653 | |
| Published online | 15 February 2002 | |
The Dyer-Roeder distance-redshift relation in inhomogeneous universes
Department of Physics, Stockholm University, 106 91 Stockholm, Sweden
Corresponding author: edvard@physto.se
Accepted: 16 November 2001
Using Monte-Carlo methods, we determine the best-fit value of the
homogeneity parameter α in the Dyer-Roeder distance-redshift relation
for a variety of redshifts, inhomogeneity models and cosmological parameter
values. The relation between α and the
fraction of compact objects, fp, is found to be approximately
linear. This relation can be parametrized with reasonable accuracy for all
cases treated in this paper
by 
where 
.
Key words: cosmology: theory / gravitational lensing
© ESO, 2002
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