Redshift Distortions as a Probe of Gravity

Details Redshift Distortions as a Probe of Gravity Redshift Distortions as a Probe of Gravity

2007-09-07

arxiv.org/abs/0709.1113v1

Astropart.Phys.29:336-339,2008

Astronomy and Astrophysics

Astrophysics

4 pages

Scientific paper

10.1016/j.astropartphys.2008.03.

Redshift distortion measurements from galaxy surveys include sensitivity to the gravitational growth index distinguishing other theories from Einstein gravity. This gravitational sensitivity is substantially free from uncertainty in the effective equation of state of the cosmic expansion history. We also illustrate the bias in the traditional application to matter density determination using f=Omega_m(a)^{0.6}, and how to avoid it.

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