Halos of Unified Dark Matter Scalar Field

Details Halos of Unified Dark Matter Scalar Field Halos of Unified Dark Matter Scalar Field

2007-12-04

arxiv.org/abs/0712.0486v2

JCAP0805:005,2008

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1088/1475-7516/2008/05/005

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.

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