Photon Rings and Shadow Size for General Axisymmetric and Stationary Integrable Spacetimes
Kiana Salehi,
Avery E. Broderick,
Boris Georgiev
Abstract: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 interest to identify what aspects of the underlying spacetime are constrained by these observations. For this purpose, we present a new formulation of an existing broad class of integrable, axisymmetric, stationary spinning black hole spacetimes, specified by four free radial functions, that makes manifest which functions are respon… Show more
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