Tomi S. Koivisto
ITP, Heidelberg

Abstract
The current acceleration of the universe's expansion might be explained by either invoking a new matter component (dark energy) or by modifying General Relativity at large scales. The f(R) gravities are simple toy models of the latter type, but some higher curvature or nonlocal variants might address the fine-tuning problems more naturally. While generating accelerating background expansion, these models generically predict also signatures in the large-scale structure. This implies several possibilities for cosmological tests of General Relativity based on linear and nonlinear structure formation.

2009 September 02, 13:30

IA/U.Porto
Centro de Astrofísica da Universidade do Porto (Auditorium)
Rua das Estrelas, 4150-762 Porto