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Unified Dark Matter Scalar Field Models

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.

preprint2011arXivOpen access
Daniele BertaccaNicola BartoloSabino Matarrese
astro-ph.COhep-phmath-phmath.MPgr-qchep-th
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Daniele BertaccaNicola BartoloSabino Matarrese

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