Unified Dark Matter Scalar Field Models

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 so...

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Bibliographic Details
Published inAdvances in Astronomy Vol. 2010; no. 1; pp. 992 - 1020
Main Authors Bertacca, Daniele, Bartolo, Nicola, Matarrese, Sabino
Format Journal Article
LanguageEnglish
Published New York Hindawi Limiteds 01.01.2010
Hindawi Publishing Corporation
Hindawi Limited
Subjects
Cosmic rays
Dark matter
Evolution
Universe
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Summary: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 noncanonical kinetic term, in connection with galactic halo rotation curves.
ISSN:1687-7969
1687-7977
DOI:10.1155/2010/904379