Large-scale inhomogeneities may improve the cosmic concordance of supernovae

Details Large-scale inhomogeneities may improve the cosmic concordance of supernovae Large-scale inhomogeneities may improve the cosmic concordance of supernovae

2010-02-05

arxiv.org/abs/1002.1232v2

Phys.Rev.Lett.105:121302,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 3 figures; replaced to match the improved version accepted for publication in PRL. A turboGL package to be used with

Scientific paper

10.1103/PhysRevLett.105.121302

We reanalyze the supernovae data from the Union Compilation including the weak lensing effects caused by inhomogeneities. We compute the lensing probability distribution function for each background solution described by the parameters Omega_M, Omega_L and w in the presence of inhomogeneities, approximately modeled with a single-mass population of halos. We then perform a likelihood analysis in the space of FLRW-parameters and compare our results with the standard approach. We find that the inclusion of lensing can move the best-fit model significantly towards the cosmic concordance of the flat LCDM model, improving the agreement with the constraints coming from the cosmic microwave background and baryon acoustic oscillations.

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