Non-linear structure formation and ‘apparent’ acceleration: an investigation

Abstract

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