Speaker
Diego Sáez
Description
In this talk I will discuss the features of the formation of shadows around some (ultra)-compact objects due to the presence of light rings surrounding the central depression of optically-thin accretion disks. The shapes of the shadows might reveal novel spacetime structures beyond the well known Kerr family, such that future observations of additional light rings through very-long baseline interferometry will make a compelling case for the existence of new gravitational physics.
