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

Dark Energy Models

Cosmological Constant

Canonical Scalar Field

Perfect Fluid

e.g. Chaplygin Gas

K-essence

e.g. Tachyon, Born-Infeld

Dark Energy Linear Perturbations

For quintessence

Order of Hubble radius ~ Gpc

Hwang & Noh 2001

Spherical Collapse with DE fluctuations

Mota & van de Bruck 2004

For quintessence:

Spherical Collapse with DE fluctuations

Lima et. al. 1997Pseudo-newtonian Cosmology

Linear Comparison PN - GR PRD arxiv 0902.3226

With pressure gradient

Spherical Collapse App.

Relativistic Spherical Collapse

For perfect fluids:

Linear Nonlinear

Relativistic Spherical Collapse

For quintessence

Relativistic Spherical Collapse

For Dark Matter in EdS

For small scales

Relativistic Spherical Collapse

Dark Matter evolution in EdS

Thanks

This work is supported by FAPESP