Black String Flow

TL;DR

This paper provides an exact description of a steady black string flow into a planar horizon, illustrating a flowing black funnel and approximating black string-black hole intersections in higher dimensions.

Contribution

It introduces an exact solution for black string flow into a horizon and extends to more general charged flows, advancing understanding of black funnel geometries.

Findings

Exact steady flow solution for black strings into horizons

Description of flowing black funnel in any dimension D>=5

Extension to charged black string flows

Abstract

We give an exact description of the steady flow of a black string into a planar horizon. The event horizon is out of equilibrium and provides a simple, exact instance of a `flowing black funnel' in any dimension D>=5. It is also an approximation to a smooth intersection between a black string and a black hole, in the limit in which the black hole is much larger than the black string thickness. The construction extends easily to more general flows, in particular charged flows.