Can Cosmic Structure Form without Dark Matter?
Abstract
One of the prime pieces of evidence for dark matter is the observation of large overdense regions in the Universe. To account for this observation, perturbations had to have grown since recombination by a factor greater than (1+z*)≃1180 where z* is the epoch of recombination. This enhanced growth does not happen in general relativity, and so dark matter is needed in the standard theory. We show here that enhanced growth can occur in alternatives to general relativity, in particular, in Bekenstein’s relativistic version of modified Newtonian dynamics.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2006
- DOI:
- arXiv:
- arXiv:astro-ph/0608602
- Bibcode:
- 2006PhRvL..97w1301D
- Keywords:
-
- 98.80.Cq;
- 04.50.+h;
- 98.65.Dx;
- 98.80.Jk;
- Particle-theory and field-theory models of the early Universe;
- Gravity in more than four dimensions Kaluza-Klein theory unified field theories;
- alternative theories of gravity;
- Superclusters;
- large-scale structure of the Universe;
- Mathematical and relativistic aspects of cosmology;
- Astrophysics
- E-Print:
- 5 pages, 3 figures