Flat rotation curves using scalar-tensor theories
Astrophysics
2008-11-26 v1
Abstract
We computed flat rotation curves from scalar-tensor theories in their weak field limit. Our model, by construction, fits a flat rotation profile for velocities of stars. As a result, the form of the scalar field potential and DM distribution in a galaxy are determined. By taking into account the constraints for the fundamental parameters of the theory , it is possible to obtain analytical results for the density profiles. For positive and negative values of , the DM matter profile is as cuspy as NFW's.
Cite
@article{arxiv.0707.2692,
title = {Flat rotation curves using scalar-tensor theories},
author = {Jorge L. Cervantes-Cota and M. A. Rodriguez-Meza and Dario Nunez},
journal= {arXiv preprint arXiv:0707.2692},
year = {2008}
}
Comments
To appear in Journal of Physics: Conference Series: VII Mexican School on Gravitation and Mathematical Physics. 26 November to 1 December 2006, Playa del Carmen, Quintana Roo, Mexico