Negative Mass Black Holes in de-Sitter Space

Abstract

We show that asymptotically de Sitter black holes of negative mass can exist in Lovelock gravity. Such black holes have horizon geometries with non-constant curvature and are known as Exotic Black Holes. We explicitly examine the case of Gauss-Bonnet gravity. We briefly discuss the positive mass case where we show how the transverse space geometry affects whether a black hole will exist or not.For negative mass solutions we shown how three different black hole spacetimes are possible depending on the transverse space geometry. We also provide closed form expressions for the geometric parameters to ensure that a black hole spacetime is observed. We close with a discussion of the massless case, where there are many different spacetimes that are permitted.

12 pages, 5 figures

References in corpus (5)

• Exact solutions for the Einstein-Gauss-Bonnet theory in five dimensions: Black holes, wormholes and spacetime horns
• Vacuum solutions with nontrivial boundaries for the Einstein-Gauss-Bonnet theory
• Negative mass bubbles in de Sitter space-time
• Thermodynamics of Exotic Black Holes in Lovelock Gravity
• Lovelock black holes with nonmaximally symmetric horizons