The trouble with Hubble: Local versus global expansion rates in inhomogeneous cosmological simulations with numerical relativity [CEA]

http://arxiv.org/abs/1807.01714


In a fully inhomogeneous, anisotropic cosmological simulation with numerical relativity, we find a local measurement of the Hubble parameter can be 1.2\% larger than a global measurement, considering scales comparable to Type 1a supernova surveys. We find inhomogeneities cannot fully resolve the tension between the \citet{riess2018b} and \citet{planck2016params} measurements, however in extreme cases the tension can be reduced to $2.3\sigma$.

Read this paper on arXiv…

H. Macpherson, P. Lasky and D. Price
Fri, 6 Jul 18
5/52

Comments: 7 pages, 3 figures, submitted to ApJ Letters