Ray tracing and Hubble diagrams in post-Newtonian cosmology

5 May 2017Viraj A. A. SanghaiPierre FleuryTimothy Clifton

On small scales the observable Universe is highly inhomogeneous, with galaxies and clusters forming a complex web of voids and filaments. The optical properties of such configurations can be quite different from the perfectly smooth Friedmann-Lema\^itre-Robertson-Walker (FLRW) solutions that are frequently used in cosmology, and must be well understood if we are to make precise inferences about fundamental physics from cosmological observations... (read more)

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