Constraining modified growth patterns with tomographic surveys

Details Constraining modified growth patterns with tomographic surveys Constraining modified growth patterns with tomographic surveys

2009-06-18

arxiv.org/abs/0906.3520v1

Nucl.Phys.Proc.Suppl.194:326-331,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

prepared for the GGI Dark Energy Conference, Florence, Italy, March 2009

Scientific paper

10.1016/j.nuclphysbps.2009.07.09

Viable models of modified gravity designed to produce cosmic acceleration at the current epoch, closely mimic the $\Lambda$CDM model at the level of background cosmology. However, this degeneracy is generically broken at the level of linear perturbations, where the modifications induce a peculiar scale-dependent pattern. A similar pattern is expected in models of coupled dark energy. I present the main results published in Pogosian and Silvestri [1], on the growth of structure in f(R) theories of gravity, and in Zhao et al. [2], on the potential of upcoming and future tomographic surveys to detect departures from the growth of cosmic structure expected within General Relativity with a cosmological constant.

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