Testing homogeneity with the fossil record of galaxies

Understand

The standard Friedmann model of cosmology is based on the Copernican Principle, i.e.

• the assumption of a homogeneous background on which structure forms via perturbations.
• Homogeneity underpins both general relativistic and modified gravity models and is central to the way in which we interpret observations of the CMB and the galaxy distribution.
• It is therefore important to probe homogeneity via observations.