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astro-ph2007★ 27 cited
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…
astro-ph2007★ 104 cited
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…