Halos of Unified Dark Matter Scalar Field
Astrophysics
2008-11-26 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
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.
Keywords
Cite
@article{arxiv.0712.0486,
title = {Halos of Unified Dark Matter Scalar Field},
author = {Daniele Bertacca and Nicola Bartolo and Sabino Matarrese},
journal= {arXiv preprint arXiv:0712.0486},
year = {2008}
}
Comments
19 pages LaTeX file; minor corrections made affecting Eqs.(52)-(56)