374 citations · 1.8k across the 21 of their papers we have counts for
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Photon Rings Around Warped Black Holes
Daniel Kapec, Alexandru Lupsasca, Andrew Strominger
The black hole photon ring is a prime target for upcoming space-based VLBI missions seeking to image the fine structure of astrophysical black holes. The classical Lyapunov exponen…
Holography of the Photon Ring
Shahar Hadar, Daniel Kapec, Alexandru Lupsasca +1
Space-based next-generation interferometers propose to measure the Lyapunov exponents of the nearly bound geodesics that comprise the photon ring surrounding the black hole M87*. W…
Higher-Dimensional Supertranslations and Weinberg's Soft Graviton Theorem
Daniel Kapec, Vyacheslav Lysov, Sabrina Pasterski +1
Asymptotic symmetries of theories with gravity in d=2m+2 spacetime dimensions are reconsidered for m>1 in light of recent results concerning d=4 BMS symmetries. Weinberg's soft gra…