2 papers
gr-qc2024
Influence of Observer Inclination and Spacetime Structure on Photon Ring Observables
Kiana Salehi, Rahul Kumar Walia, Dominic Chang +1
Recent observations of the near-horizon regions of BHs, particularly the images captured by the Event Horizon Telescope (EHT) collaboration, have greatly advanced our understanding…
gr-qc2024
Spacetime Measurements with the Photon Ring
Rahul Kumar Walia, Prashant Kocherlakota, Dominic O. Chang +1
We explore the universal symmetries of the black hole photon ring in a wide range of non-Kerr spacetimes, including the Kerr-Newman, Kerr-Sen, Kerr-Bardeen, and Kerr-Hayward metric…