Gravitational Lensing by Compact Objects in the Galactic Center:Can we exclude or detect a boson star?

Over the last few decades, it has been increasingly clear that there
is an extremely compact object at Sgr A* in the center of the galaxy.
Some have looked at the theoretical gravitational lensing properties
of this object, particularly on stars orbiting the galactic center. In
this talk, I explore the possibility that a "boson star" or compact
collection of scalar particles, is responsible for the large mass at
Sgr A*. This possibility cannot be ruled out by observation of
dynamical processes because of the compactness of a boson star.
However, I argue that the gravitational lensing properties of a boson
star have unique properties and their presence or absence would be
strong evidence for or against a boson star in the galactic
center.