Flat rotation curves using scalar-tensor theories
arXiv:0707.2692 · doi:10.1088/1742-6596/91/1/012007
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.
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