Asymptotically locally AdS and flat black holes in the presence of an electric field in the Horndeski scenario

Abstract

Asymptotically locally anti--de Sitter and asymptotically flat black hole solutions are found for a particular case of the Horndeski action. The action contains the Einstein-Hilbert term with a cosmological constant, a real scalar field with a nonminimal kinetic coupling given by the Einstein tensor, the minimal kinetic coupling, and the Maxwell term. There is no scalar potential. The solution has two integration constants related with the mass and the electric charge. The solution is given for all dimensions. A new class of asymptotically locally flat spherically symmetric black holes is found when the minimal kinetic coupling vanishes and the cosmological constant is present. In this case, we get a solution which represents an electric universe. The electric field at infinity is only supported by $\mathrm{\ensuremath{\Lambda}}$. When the cosmological constant vanishes, the black hole is asymptotically flat.