MG12 - Talk detail |
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Participant |
Clifton, Timothy | |
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Institution |
University of Oxford - Astrophysics department, Keble Road - Oxford - - United Kingdom | |
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Session |
Talk |
Abstract |
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COT2 |
Cosmology without the fluid approximation |
We investigate inhomogeneous cosmological models that have a matter content composed of many discrete sources, rather than a continuous energy density. It is found that while the dynamics of the expansion approach the standard FRW results in the limit of homogeneity, the optical properties of the space-time do not. As such, corrections to the standard luminosity distance-redshift relations are required. This has consequences for parameter estimation and model testing. |