Black holes in realistic branes: black string-like objects?

TL;DR

This paper investigates black string-like objects in an expanding universe within braneworld models, using McVittie's solution, and highlights their fundamental role when the brane's Hubble parameter is positive.

Contribution

It introduces a model of black string-like objects in a dynamical brane universe, extending previous static solutions to a cosmologically expanding context.

Findings

Black string-like objects are significant in expanding brane universes.

The bulk metric near the brane resembles previous black string solutions.

Positive Hubble parameter correlates with the prominence of these objects.

Abstract

A realistic model describing a black string-like object in an expanding Universe is analyzed in the context of the McVittie's solution of the Einstein field equations. The bulk metric near the brane is provided analogously to previous solutions for black strings. In particular, we show that at least when the Hubble parameter on the brane is positive, a black string-like object seems to play a fundamental role in the braneworld scenario, generalizing the standard black strings in the context of a dynamical brane.