Showing hep-thShow all
2 papers · 1 filter
hep-th2025
Photon rings in a holographic toy model
Stéphane Detournay, Sahaja Kanuri, Alexandru Lupsasca +3
Light circling around an astrophysical black hole can spend a long time skirting its unstably bound photon orbits before escaping to infinity. To a distant observer, this orbiting…
hep-th2024
Boundary Conditions for Extremal Black Holes from 2d Gravity
Stéphane Detournay, Thomas Smoes, Raphaela Wutte
We devise new boundary conditions for the near-horizon geometries of extremal BTZ and Kerr black holes, as well as for the ultra-cold limit of the Kerr-de Sitter black hole. These…