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Universal Bounds on Black Hole Observables Imposed by Energy Conditions
Rahul Kumar Walia, Boris Georgiev, Chi-kwan Chan
We establish a universal connection between the classical energy conditions and directly observable black hole properties. By imposing the energy conditions locally at the photon s…
Photon Rings and Shadow Size for General Integrable Spacetimes
Kiana Salehi, Avery Broderick, Boris Georgiev
There are now multiple direct probes of the region near black hole horizons, including direct imaging with the Event Horizon Telescope (EHT). As a result, it is now of considerable…
Constraints on black-hole charges with the 2017 EHT observations of M87*
Prashant Kocherlakota, Luciano Rezzolla, Heino Falcke +234
Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M8…