Hints on halo evolution in SFDM models with galaxy observations

Understand

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.