The innermost arcsecond of the Milky Way hosts a massive black hole of roughly 4 × 10~6M~⊙ and a cluster of stars orbiting around it. This system is very suitable to study gravitational lensing effects in an environment ruled by a very intense gravitational field. When a good alignment occurs between the black hole and one of these stars along its orbit, gravitational lensing effects are generated, like the apparition of secondary images, or a time-dependent magnification of the source. The concrete possibility to observe this kind of events experimentally represents a challenge for the next generation telescopes.
展开▼
