Testing Gravity Using Large-Scale Redshift-Space Distortions

Understand

We use Luminous Red Galaxies from the Sloan Digital Sky Survey II to test the cosmological structure growth in two alternatives to the standard LCDM+GR cosmological model.

• We compare observed three-dimensional clustering in SDSS DR7 with theoretical predictions for the standard vanilla LCDM+GR model, Unified Dark Matter cosmologies and the normal branch DGP.
• In computing the expected correlations in UDM cosmologies, we derive a parameterized formula for the growth factor in these models.
• For our analysis we apply the methodology tested in Raccanelli et al.