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Title: Halos of unified dark matter scalar field

We investigate the static and spherically symmetric solutions of Einstein's equations for a scalar field with a 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{sub c}(r) is in good agreement with observational data. We show that there exist suitable scalar field Lagrangians that allow us to describe the cosmological background evolution and the static solutions with a single dark fluid.
Authors:
; ;  [1]
  1. Dipartimento di Fisica 'Galileo Galilei', Universita di Padova, and INFN Sezione di Padova, via F Marzolo 8, I-35131 Padova (Italy)
Publication Date:
OSTI Identifier:
22156618
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2008; Journal Issue: 05; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EINSTEIN FIELD EQUATIONS; GALACTIC EVOLUTION; LAGRANGIAN FUNCTION; MATHEMATICAL SOLUTIONS; NONLUMINOUS MATTER; ROTATION; SCALAR FIELDS; SPHERICAL CONFIGURATION; SYMMETRY; UNIVERSE