Supersymmetric $AdS_6$ black holes from $F(4)$ gauged supergravity

TL;DR

This paper constructs and analyzes supersymmetric $AdS_6$ black holes in $F(4)$ gauged supergravity, discovering new horizon geometries, numerically solving for black hole solutions, and matching their entropy with gauge theory predictions.

Contribution

It introduces new supersymmetric $AdS_2$ horizon solutions with complex geometries and demonstrates their physical relevance through entropy matching with gauge theory indices.

Findings

Found a new $AdS_2 imes \Sigma_{g_1} imes \Sigma_{g_2}$ horizon solution.

Numerically constructed the full black hole solutions interpolating between $AdS_6$ and $AdS_2$ horizons.

Matched black hole entropy with the topologically twisted index of 5d $USp(2N)$ gauge theory.

Abstract

In $F(4)$ gauged supergravity in six dimensions, we study supersymmetric $AdS_6$ black holes with various horizon geometries. We find a new $AdS_2\,\times\,\Sigma_{\mathfrak{g}_1}\times\Sigma_{\mathfrak{g}_2}$ horizon solution with $\mathfrak{g}_1>1$ and $\mathfrak{g}_2>1$, and present the black hole solution numerically. The full black hole is an interpolating geometry between the asymptotically $AdS_6$ boundary and the $AdS_2\,\times\,\Sigma_{\mathfrak{g}_1}\times\Sigma_{\mathfrak{g}_2}$ horizon. We calculate the Bekenstein-Hawking entropy of the black hole and find a match with the recently calculated topologically twisted index of 5d $USp(2N)$ gauge theory on $\Sigma_{\mathfrak{g}_1}\times\Sigma_{\mathfrak{g}_2}\times{S}^1$ in the large $N$ limit. We also find black hole horizons of K\"ahler four-cycles in Calabi-Yau fourfolds and on Cayley four-cycles in $Spin(7)$ manifolds.