Errors in Estimating Omega_Lambda due to the Fluid Approximation Export

@article{citeulike:6080566, abstract = {The matter content of the Universe is strongly inhomogeneous on small scales. Motivated by this fact, we consider a model of the Universe that has regularly spaced discrete masses, rather than a continuous fluid. The optical properties of such space-times can differ considerably from the continuous fluid case, even if the 'average' dynamics are the same. We show that these differences have consequences for cosmological parameter estimation, and that fitting to recent supernovae observations gives a correction to the inferred value of Omega\_Lambda of \~{}10\%.}, archivePrefix = {arXiv}, author = {Clifton, Timothy and Ferreira, Pedro G.}, citeulike-article-id = {6080566}, citeulike-linkout-0 = {http://arxiv.org/abs/0908.4488}, citeulike-linkout-1 = {http://arxiv.org/pdf/0908.4488}, day = {5}, eprint = {0908.4488}, month = {Nov}, posted-at = {2009-11-06 11:39:53}, priority = {2}, title = {Errors in Estimating Omega\_Lambda due to the Fluid Approximation}, url = {http://arxiv.org/abs/0908.4488}, year = {2009} }

TY - JOUR ID - citeulike:6080566 L3 - citeulike-article-id:6080566 N2 - The matter content of the Universe is strongly inhomogeneous on small scales. Motivated by this fact, we consider a model of the Universe that has regularly spaced discrete masses, rather than a continuous fluid. The optical properties of such space-times can differ considerably from the continuous fluid case, even if the 'average' dynamics are the same. We show that these differences have consequences for cosmological parameter estimation, and that fitting to recent supernovae observations gives a correction to the inferred value of Omega_Lambda of ~10%. TI - Errors in Estimating Omega_Lambda due to the Fluid Approximation AU - Clifton, Timothy AU - Ferreira, Pedro PY - 2009/Nov/05/ UR - http://arxiv.org/abs/0908.4488 ER -