TY - JOUR A2 - Hardcastle, Martin AU - Bertacca, Daniele AU - Bartolo, Nicola AU - Matarrese, Sabino PY - 2010 DA - 2010/12/01 TI - Unified Dark Matter Scalar Field Models SP - 904379 VL - 2010 AB - We analyze and review cosmological models in which the dynamicsof 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. SN - 1687-7969 UR - https://doi.org/10.1155/2010/904379 DO - 10.1155/2010/904379 JF - Advances in Astronomy PB - Hindawi Publishing Corporation KW - ER -