2008/02/07 by Scott F. Daniel, Robert R. Caldwell, Asantha Cooray +1 · 1 citation
Physics and Astronomy · #astro-ph
paper · pdf · doi:10.1103/physrevd.77.103513
published as Phys.Rev.D77:103513,2008 · 12 pages, 16 figures
arxiv created 2008/02/07 · arxiv updated 2009/12/01
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.