317 citations · 360 across the 9 of their papers we have counts for
9 papers
Fully global numerical evolutions of the linearised spin-2 equation
Merlyn Barrer, Jörg Frauendiener, Jörg Hennig +3
We study the linearised spin-2 field on conformally compactified Minkowski spacetime. Initial data are prescribed on past null infinity , and the system is evolved t…
The balance problem for aligned black holes
Jörg Hennig
An intriguing open problem in general relativity is whether a stationary equilibrium configuration of multiple, physically relevant black holes can exist. In such a hypothetical se…
Soliton methods and the black hole balance problem
Jörg Hennig
This article is an extended version of a presentation given at KOZWaves 2024: The 6th Australasian Conference on Wave Science, held in Dunedin, New Zealand. Soliton methods were in…
Smooth Gowdy-symmetric generalised Taub-NUT solutions with polynomial initial data
Jörg Hennig
We consider smooth Gowdy-symmetric generalised Taub-NUT solutions, a class of inhomogeneous cosmological models with spatial three-sphere topology. They are characterised by existe…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Gowdy-Symmetric Vacuum and Electrovacuum Solutions
Jörg Hennig
"Smooth Gowdy-symmetric generalized Taub-NUT solutions" are a class of inhomogeneous cosmological vacuum models with a past and a future Cauchy horizon. In this proceedings contrib…
Gowdy-symmetric cosmological models with Cauchy horizons ruled by non-closed null generators
Jörg Hennig
Smooth Gowdy-symmetric generalized Taub-NUT solutions are a class of inhomogeneous cosmological models with spatial three-sphere topology. They have a past Cauchy horizon with clos…
Stationary black-hole binaries: A non-existence proof
Gernot Neugebauer, Jörg Hennig
We resume former discussions of the question, whether the spin-spin repulsion and the gravitational attraction of two aligned black holes can balance each other. Based on the solut…
Stationary two-black-hole configurations: A non-existence proof
Gernot Neugebauer, Jörg Hennig
Based on the solution of a boundary problem for disconnected (Killing) horizons and the resulting violation of characteristic black hole properties, we present a non-existence proo…