Speaker
Description
A deep correspondence exists between the quasi-normal modes (QNMs) of ultra-compact objects and their observable gravitational lensing features, such as photon rings and shadows. In the era of multi-messenger astrophysics, a comprehensive understanding of this relation is crucial for extracting fundamental spacetime properties. We present how we can use this correspondence to test beyond General Relativity theories. We present a methodology using simulated images of exotic compact object, analyzing their gravitational lensing observables, such as the shadow and photon ring properties, that directly map to their predicted QNM spectra. This approach offers a powerful, complementary tool for doing fundamental physics in the gravitational waves and black hole imaging communities.
