Spherical Scalar Field Halo in Galaxies
Astrophysics
2008-11-26 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We study a spherically symmetric fluctuation of scalar dark matter in the cosmos and show that it could be the dark matter in galaxies, provided that the scalar field has an exponential potential whose overall sign is negative and whose exponent is constrained observationally by the rotation velocities of galaxies. The local space-time of the fluctuation contains a three dimensional space-like hypersurface with surplus of angle.
Cite
@article{arxiv.astro-ph/0003398,
title = {Spherical Scalar Field Halo in Galaxies},
author = {T. Matos and F. S. Guzman and D. Nunez},
journal= {arXiv preprint arXiv:astro-ph/0003398},
year = {2008}
}
Comments
5 REVTeX pages, no figures. Contains important suggestions provided by the referee. Final version, to appear in Phys. Rev. D