Constraints on higher-dimensional gravity from the cosmic shear three-point correlation function

Details Constraints on higher-dimensional gravity from the cosmic shear three-point correlation function Constraints on higher-dimensional gravity from the cosmic shear three-point correlation function

2004-09-09

arxiv.org/abs/astro-ph/0409224v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, submitted to PRL

Scientific paper

With the developments of large galaxy surveys or cosmic shear surveys it is now possible to map the dark matter distribution at truly cosmological scales. Detailed examinations of the statistical properties of the dark matter distribution reveal the detail of the large-scale structure growth of the Universe. In particular it is shown here that the behavior of the density field bi-spectrum is sensitive to departure from normal gravity in a way which depends only weakly on the background evolution. The cosmic shear bispectrum appears to be particularly sensitive to changes in the Poisson equation: we show that the current cosmic shear data can already be used to infer constraints on the scale of a possible higher-dimensional gravity, above 2 h^{-1}Mpc.

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