Nonlinear Structure Formation and "Apparent" Acceleration: an Investigation

Abstract

We present an analytically solvable nonlinear model of structure formation in a Universe with only dust. The model is an LTB solution (of General Relativity) and structures are shells of different density. We show that the luminosity distance-redshift relation has significant corrections at low redshift when the density contrast becomes nonlinear. A minimal effect is a correction in apparent magnitudes of order 0.15. We discuss different possibilities that could further enhance this effect and mimick Dark Energy.

57 pages, 13 figures. Formatting errors fixed

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• Errors in Estimating Omega_Lambda due to the Fluid Approximation
• Description of our cosmological spacetime as a perturbed conformal Newtonian metric and implications for the backreaction proposal for the accelerating universe
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• Cosmology Without Averaging
• Rendering Dark Energy Void
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• Is dark energy an effect of averaging?
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• The Metric of the Cosmos from Luminosity and Age Data
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• Discriminating different models of luminosity-redshift distribution
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• Dynamics of Void and its Shape in Redshift Space
• Averaged Lemaître-Tolman-Bondi dynamics
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