The Effect of Inhomogeneities on the Luminosity Distance-Redshift Relation: is Dark Energy Necessary in a Perturbed Universe?
Abstract
The luminosity distance-redshift relation is one of the fundamental tools of modern cosmology. Cosmological observations implementing the luminosity distance-redshift relation tell us that the Universe is presently undergoing a phase of accelerated expansion. This seems to call for a mysterious Dark Energy component with negative pressure. In this talk we argue that the need of a Dark Energy fluid may be challenged once a realistic inhomogeneous Universe is considered and that an accelerated expansion may be consistent with a matter-dominated Universe.
- Publication:
-
22nd Texas Symposium on Relativistic Astrophysics
- Pub Date:
- 2005
- Bibcode:
- 2005tsra.conf...15R