Halos of Unified Dark Matter Scalar Field

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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)

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Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/199808

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0712.0486
 http://arxiv.org/abs/0712.0486
 JCAP0805:005,2008
 doi:10.1088/1475-7516/2008/05/005

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arXiv