Extended Near Horizon Symmetries of Extremal BTZ Black Holes in 3D Massive Gravity
arXiv:2412.18286 · doi:10.1007/JHEP03(2025)054
Abstract
We study the asymptotic symmetries of near-horizon extremal BTZ black holes in higher derivative theories of gravity, such as New Massive Gravity and Topological Massive Gravity. By employing a particular boundary condition and the regularization prescription proposed earlier for the Einstein gravity, we demonstrate the existence of two centrally extended Virasoro algebras. The central charges evaluated within this framework are in agreement with their corresponding expressions evaluated at the spatial infinity. We also discuss the robustness of the regularization procedure by relating asymptotic and near-horizon geometries.
21 pages, Version 3: Published Version
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