Large Scale Structure as a Probe of Gravitational Slip

Details Large Scale Structure as a Probe of Gravitational Slip Large Scale Structure as a Probe of Gravitational Slip

2008-02-07

arxiv.org/abs/0802.1068v1

Phys.Rev.D77:103513,2008

Astronomy and Astrophysics

Astrophysics

12 pages, 16 figures

Scientific paper

10.1103/PhysRevD.77.103513

A new time-dependent, scale-independent parameter, \varpi, is employed in a phenomenological model of the deviation from General Relativity in which the Newtonian and longitudinal gravitational potentials slip apart on cosmological scales as dark energy, assumed to be arising from a new theory of gravitation, appears to dominate the universe. A comparison is presented between \varpi and other parameterized post-Friedmannian models in the literature. The effect of \varpi on the cosmic microwave background anisotropy spectrum, the growth of large scale structure, the galaxy weak-lensing correlation function, and cross-correlations of cosmic microwave background anisotropy with galaxy clustering are illustrated. Cosmological models with conventional maximum likelihood parameters are shown to find agreement with a narrow range of gravitational slip.

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