Supersymmetric black holes with spiky horizons

Abstract

We use the recipe of [1] to find half-BPS near-horizon geometries in the t3 model of N = 2, D = 4 gauged supergravity, and explicitely construct some new examples. Among these are black holes with noncompact horizons, but also with spherical horizons that have conical singularities (spikes) at one of the two poles. A particular family of them is extended to the full black hole geometry. Applying a double-Wick rotation to the near-horizon region, we obtain solutions with NUT charge that asymptote to curved domain walls with AdS3 world volume. These new solutions may provide interesting testgrounds to address fundamental questions related to quantum gravity and holography.

Holographic duals of M5-branes on an irregularly punctured sphere

“…This section is an extension of the computations performed in [24] to account for the more general flavour symmetry that our solutions exhibit, as such we will present the bare bones computation when there is no risk of confusion. 15 The ultimate goal of this section is to give an independent derivation of the observables studied in the gravity theory and to understand the breaking of a u(1) isometry algebra by a Stückelberg mechanism as observed in [24].…”

“…Recently, solutions with non-constant curvature metrics have been studied in string and M-theory, thus evading the uniformization theorems. These solutions are known as spindles [12][13][14][15][16][17][18][19][20][21][22] and discs [18,[23][24][25][26][27][28][29] and can be viewed as the horizon of accelerating black objects. 2 Spindles are the orbifold WCP 1 n − ,n + , i.e.…”

A tale of (M)2 twists

“…There has been a recent surge in studying supersymmetric AdS d−2 × Σ solutions of d = 4, 5, 6, 7 gauged supergravity, where Σ is a Riemann surface admitting a non-constant curvature metric. Solutions where Σ is the weighted projective space WCP 1 n + ,n − , also known as a spindle, were first found in [1], and later extended in [2][3][4][5][6][7][8][9][10]. These solutions are naturally interpreted as arising from compactifying M2-, D3-, D4-, and M5-branes on the spindle and can be uplifted to 10-or 11-dimensional supergravity.…”

Holographic duals of M5-branes on an irregularly punctured sphere

“…Recently, solutions with non-constant curvature metrics have been studied in string and M-theory, thus evading the uniformization theorems. These solutions are known as spindles [12][13][14][15][16][17][18][19][20][21][22] and discs [18,[23][24][25][26][27][28][29] and can be viewed as the horizon of accelerating black objects. 2 Spindles are the orbifold WCP 1 n − ,n + , i.e.…”