Dynamical Black Rings with a Positive Cosmological Constant

TL;DR

This paper constructs and analyzes dynamical black ring solutions in five-dimensional Einstein-Maxwell theory with a positive cosmological constant, revealing their evolution into black holes and interactions.

Contribution

It introduces the first dynamical black ring solutions in this setting and explores their time evolution and coalescence behaviors.

Findings

Black rings shrink and transform into black holes over time

Multiple black rings can coalesce into a single black hole

The solutions provide insights into dynamical horizon geometries

Abstract

We construct dynamical black ring solutions in the five dimensional Einstein-Maxwell system with a positive cosmological constant and investigate the geometrical structure. The solutions describe the physical process such that a thin black ring at early time shrinks and changes into a single black hole as time increase. We also discuss the multi-black rings and the coalescence of them.