Can TeVeS avoid Dark Matter on galactic scales?
Abstract
A fully relativistic analysis of gravitational lensing in TeVeS is presented. By estimating the lensing masses for a set of six lenses from the CASTLES database, and then comparing them to the stellar mass, the deficit between the two is obtained and analysed. Considering a parametrised range for the TeVeS function , which controls the strength of the modification to gravity, it is found that on galactic scales TeVeS requires additional dark matter with the commonly used . A soft dependence of the results on the cosmological framework and the TeVeS free parameters is discussed. For one particular form of , TeVeS is found to require very little dark matter. This choice is however ruled out by rotation curve data. The inability to simultaneously fit lensing and rotation curves for a single form of is a challenge to a "no dark matter" TeVeS proposal.
Keywords
Cite
@article{arxiv.0901.3932,
title = {Can TeVeS avoid Dark Matter on galactic scales?},
author = {Nick E. Mavromatos and Mairi Sakellariadou and Muhammad Furqaan Yusaf},
journal= {arXiv preprint arXiv:0901.3932},
year = {2009}
}
Comments
Four pages LaTeX, three eps figures incorporated