2009/01/25 by Nick E. Mavromatos, Mairi Sakellariadou, Muhammad Furqaan Yusaf · 1 citation
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy rotation curve #Gravitational lens #Halo #Modified Newtonian dynamics #Physics #Weak gravitational lensing #astro-ph.GA #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.79.081301
published as Phys.Rev.D79:081301,2009 · Four pages LaTeX, three eps figures incorporated
arxiv created 2009/01/25 · openalex publication_date 2009/04/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A fully relativistic analysis of gravitational lensing in tensor-vector-scalar (TeVeS) theory 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 analyzed. Considering a parametrized range for the TeVeS function \ensuremathμ(y), 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 \ensuremathμ(y). A soft dependence of the results on the cosmological framework and the TeVeS free parameters is discussed. For one particular form of \ensuremathμ(y), 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 \ensuremathμ(y) is a challenge to a no dark matter TeVeS proposal.