Halos of Unified Dark Matter Scalar Field

Abstract

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 and dark energy components of the Universe. In particular, we give a prescription to obtain solutions (dark halos) whose rotation curve v_c(r) is in good agreement with observational data. We show that there exist suitable scalar field Lagrangians that allow to describe the cosmological background evolution and the static solutions with a single dark fluid.

19 pages LaTeX file; minor corrections made affecting Eqs.(52)-(56)

References in corpus (7)

• Inflation, dark matter and dark energy in the string landscape
• Unified Dark Matter in Scalar Field Cosmologies
• $\Lambda \alpha$DM: Observational constraints on unified dark matter with constant speed of sound
• Affine equation of state from quintessence and k-essence fields
• ISW effect in Unified Dark Matter Scalar Field Cosmologies: an analytical approach
• The Homogeneous Scalar Field and the Wet Dark Sides of the Universe
• Galactic halos and gravastars: static spherically symmetric spacetimes in modern general relativity and astrophysics

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• Multi-fluid cosmology in Einstein gravity: analytical solutions
• A study of interacting scalar field model from the perspective of the dynamical systems theory
• Non-minimally Coupled Tachyon Field in Teleparallel Gravity
• Galactic Halos and Black Holes in Non-Canonical Scalar Field Theories
• Variational symmetries and superintegrability in multifield cosmology