1. 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

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

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

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

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

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

7. Relativistic Spherical Collapse For perfect fluids: LinearNonlinear

8. Relativistic Spherical Collapse For quintessence

9. Relativistic Spherical Collapse For Dark Matter in EdS For small scales

10. Relativistic Spherical Collapse Dark Matter evolution in EdS

11. Thanks This work is supported by FAPESP