Search for Global Metric Anisotropy in Type Ia Supernova Data

Details Search for Global Metric Anisotropy in Type Ia Supernova Data Search for Global Metric Anisotropy in Type Ia Supernova Data

2005-10-28

arxiv.org/abs/astro-ph/0510803v3

Mod.Phys.Lett.A22:1153-1165,2007

Astronomy and Astrophysics

Astrophysics

16 pages, 2 figures, minor changes, to be published in Modern Physics Letters A

Scientific paper

10.1142/S0217732307023389

We examine the Type 1a supernova data in order to determine if it shows any signal of large scale anisotropy. The anisotropy is modelled by an extended G\"{o}del metric, which incorporates expansion along with rotation. The model is smoothly connected to the usual FRW type, while expressing anisotropic metric effects depending on certain parameters. We find no significant signal of anisotropy in the data. We obtain bounds on an anisotropic redshift versus magnitude relationship, and accompanying parameters of the G\"{o}del-Obukhov metric.

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