Search for Global Metric Anisotropy in Type Ia Supernova Data

Abstract

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 Gödel 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 Gödel-Obukhov metric.

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

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Cited by in corpus (8)

• Accelerating dark energy models with anisotropic fluid in Bianchi type-$V{I}_0$ space-time
• Global and Local Effects of Rotation: Observational Aspects
• Direction Dependent Non-gaussianity in High-z Supernova Data
• Dipole Modulation of Cosmic Microwave Background Temperature and Polarization
• Energy and Angular Momentum Densities in a Godel-Type Universe in the Teleparallel Geometry
• Supernovae anisotropy power spectrum
• Probing the Cosmological Principle with weak lensing shear
• High-z Supernova Type Ia Data: non-Gaussianity and Direction Dependence