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How the Scalar Field of Unified Dark Matter Models Can Cluster
Daniele Bertacca, Nicola Bartolo, Antonaldo Diaferio +1
We use scalar-field Lagrangians with a non-canonical kinetic term to obtain unified dark matter models where both the dark matter and the dark energy, the latter mimicking a cosmol…
Halos of Unified Dark Matter Scalar Field
Daniele Bertacca, Nicola Bartolo, Sabino Matarrese
We investigate the static and spherically symmetric solutions of Einstein's equations for a scalar field with non-canonical kinetic term, assumed to provide both the dark matter an…
Unified Dark Matter in Scalar Field Cosmologies
Daniele Bertacca, Sabino Matarrese, Massimo Pietroni
Considering the general Lagrangian of k-essence models, we study and classify them through variables connected to the fluid equation of state parameter w_κ. This allows to find sol…