Abstract:

In a fully inhomogeneous, anisotropic cosmological simulation performed by solving Einstein’s equations with numerical relativity, we find that a local measurement of the effective Hubble parameter differs by less than 1% compared to the global value. This variance is consistent with predictions from Newtonian gravity. We analyze the averaged local expansion rate on scales comparable to Type 1a supernova surveys, and find that local variance cannot resolve the tension between the Riess et al. and Planck Collaboration et al. measurements.