Halos of unified dark matter scalar field

Journal Article · Thu May 15 00:00:00 EDT 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/05/005· OSTI ID:22156618

Bertacca, Daniele; Bartolo, Nicola; Matarrese, Sabino ^[1]

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1. Dipartimento di Fisica 'Galileo Galilei', Universita di Padova, and INFN Sezione di Padova, via F Marzolo 8, I-35131 Padova (Italy)

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.

• OSTI ID: 22156618
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
EINSTEIN FIELD EQUATIONS
GALACTIC EVOLUTION
LAGRANGIAN FUNCTION
MATHEMATICAL SOLUTIONS
NONLUMINOUS MATTER
ROTATION
SCALAR FIELDS
SPHERICAL CONFIGURATION
SYMMETRY
UNIVERSE