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Modeling nonlinear dark energy fluctuations Ronaldo Carlotto Batista IF-USP Raul Abramo, Rogério Rosenfeld, Lamartine Liberato I Workshop: Challanges of New Physics in the Space Campos do Jordão, 30/04/2009

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Dark Energy Models Cosmological Constant Canonical Scalar Field Perfect Fluid e.g. Chaplygin Gas K-essence e.g. Tachyon, Born-Infeld

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Dark Energy Linear Perturbations For quintessence Order of Hubble radius ~ Gpc Hwang & Noh 2001

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Spherical Collapse with DE fluctuations Mota & van de Bruck 2004 For quintessence:

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Spherical Collapse with DE fluctuations Lima et. al. 1997 Pseudo-newtonian Cosmology

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Linear Comparison PN - GR PRD arxiv 0902.3226 With pressure gradient Spherical Collapse App.

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Relativistic Spherical Collapse For perfect fluids: LinearNonlinear

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Relativistic Spherical Collapse For quintessence

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Relativistic Spherical Collapse For Dark Matter in EdS For small scales

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Relativistic Spherical Collapse Dark Matter evolution in EdS

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Thanks This work is supported by FAPESP

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