Self-Gravitating Static Non-Critical Black Holes in 4$D$ Einstein-Klein-Gordon System with Nonminimal Derivative Coupling

Abstract

We study static non-critical hairy black holes of four dimensional gravitational model with nonminimal derivative coupling and a scalar potential turned on. By taking an ansatz, namely, the first derivative of the scalar field is proportional to square root of a metric function, we reduce the Einstein field equation and the scalar field equation of motions into a single highly nonlinear differential equation. This setup implies that the hair is secondary-like since the scalar charge-like depends on the non-constant mass-like quantity in the asymptotic limit. Then, we show that near boundaries the solution is not the critical point of the scalar potential and the effective geometries become spaces of constant scalar curvature.

arXiv comment13 pages and no figure. Major revision: Title slightly changed, some references added, section 1, 3, 4, 5 mostly modified, and some typos corrected. Accepted in Gen. Rel. Grav. 2018. Published version

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