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Can TeVeS avoid Dark Matter on galactic scales? · Around

2009

Can TeVeS avoid Dark Matter on galactic scales?

Mavromatos, Nick E., Sakellariadou, Mairi, Yusaf, Muhammad Furqaan

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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 $mu(y)$, 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 $mu(y)$.
A soft dependence of the results on the cosmological framework and the TeVeS free parameters is discussed.

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N. E. Mavromatos and M. Sakellariadou, Phys. Lett. B 652
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