  A massive, self-interacting scalar field has been considered as a possible
candidate for the dark matter in the universe. We present an observational
constraint to the model arising from strong lensing observations in galaxies.
The result points to a discrepancy in the properties of scalar field dark
matter halos for dwarf and lens galaxies, mainly because halo parameters are
directly related to physical quantities in the model. This is an important
indication that it becomes necessary to have a better understanding of halo
evolution in scalar field dark matter models, where the presence of baryons can
play an important role.

Cosmology and Nongalactic Astrophysics;General Relativity and Quantum Cosmology