Title: "On TeVeS and the Bullet Cluster"

Abstract:

Bekenstein's theory of modified gravity, TeVeS, is a bimetric modification of General Relativity which includes, in addition to the metric tensor, two additional fields: one scalar, and one vectorial. It was borne out as an attempt to raise the conjecture of MOND to the status of a fully relativistic theory, capable of explaining dark matter as a purely gravitational effect. The Bullet Cluster (1E 0657-558) has been held as a direct and decisive evidence for the existence of dark matter since it is believed to display an unambiguous spatial offset between the former and the baryonic matter. Nevertheless, no rigorous analysis of the system under TeVeS has yet been accomplished. We present such a study by following a perturbative analysis in a static axisymmetric metric, with particular emphasis on the gravitational lensing aspects, trying to reconcile the X-rays and weak lensing measurements