Probing Dark Energy Inhomogeneities with Supernovae

Details Probing Dark Energy Inhomogeneities with Supernovae Probing Dark Energy Inhomogeneities with Supernovae

2008-06-03

arxiv.org/abs/0806.0496v2

JCAP06(2008)027

Astronomy and Astrophysics

Astrophysics

16 pages, 6 figures, matches the published version JCAP06(2008)027

Scientific paper

10.1088/1475-7516/2008/06/027

We discuss the possibility to identify anisotropic and/or inhomogeneous cosmological models using type Ia supernova data. A search for correlations in current type Ia peak magnitudes over a large range of angular scales yields a null result. However, the same analysis limited to supernovae at low redshift, shows a feeble anticorrelation at the two sigma level at angular scales of about 40 degrees. Upcoming data from, e.g., the SNLS (Supernova Legacy Survey) and the SDSS-II (SDSS: Sloan Digital Sky Survey) supernova searches will improve our limits on the size of - or possibly detect - possible correlations also at high redshift at the per cent level in the near future. With data from the proposed SNAP (SuperNova Acceleration Probe) satellite, we will be able to detect the induced correlations from gravitational lensing on type Ia peak magnitudes on scales less than a degree.

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