Unified Dark Matter Scalar Field Models
Abstract
In this work we analyze and review cosmological models in which the dynamics of a single scalar field accounts for a unified description of the Dark Matter and Dark Energy sectors, dubbed Unified Dark Matter (UDM) models. In this framework, we consider the general Lagrangian of k-essence, which allows to find solutions around which the scalar field describes the desired mixture of Dark Matter and Dark Energy. We also discuss static and spherically symmetric solutions of Einstein's equations for a scalar field with non-canonical kinetic term, in connection with galactic halo rotation curves.
Keywords
Cite
@article{arxiv.1008.0614,
title = {Unified Dark Matter Scalar Field Models},
author = {Daniele Bertacca and Nicola Bartolo and Sabino Matarrese},
journal= {arXiv preprint arXiv:1008.0614},
year = {2011}
}
Comments
57 pages, 6 figures, LaTeX file. Typos corrected; Added References; Revised according to reviewer's suggestions; Invited Review for the special issue "Focus Issue on Dark Matter" for Advances in Astronomy