Confronting MOND and TeVeS with strong gravitational lensing over
  galactic scales: an extended survey
  The validity of MOND and TeVeS models of modified gravity has been recently
tested by using lensing techniques, with the conclusion that a non-trivial
component in the form of dark matter is needed in order to match the
observations. In this work those analyses are extended by comparing lensing to
stellar masses for a sample of nine strong gravitational lenses that probe
galactic scales. The sample is extracted from a recent work that presents the
mass profile out to a few effective radii, therefore reaching into regions that
are dominated by dark matter in the standard (general relativity) scenario. A
range of interpolating functions are explored to test the validity of
MOND/TeVeS in these systems. Out of the nine systems, there are five robust
candidates with a significant excess (higher that 50%) of lensing mass with
respect to stellar mass, irrespective of the stellar initial mass function. One
of these lenses (Q0957) is located at the centre of a galactic cluster. This
system might be accommodated in MOND/TeVeS via the addition of a hot component,
like a 2 eV neutrino, that contribute over cluster scales. However, the other
four robust candidates (LBQS1009, HE1104, B1600, HE2149) are located in
field/group regions, so that a cold component (CDM) would be required even
within the MOND/TeVeS framework. Our results therefore do not support recent
claims that these alternative scenarios to CDM can survive astrophysical data.
