7 citations · 18 across the 4 of their papers we have counts for
7 papers · 1 filter
A space-time calculus based on symmetric 2-spinors
Steffen Aksteiner, Thomas Bäckdahl
In this paper we present a space-time calculus for symmetric spinors, including a product with a number of index contractions followed by symmetrization. As all operations stay wit…
Kaehler geometry of black holes and gravitational instantons
Steffen Aksteiner, Bernardo Araneda
We obtain a closed formula for the Kaehler potential of a broad class of four-dimensional Lorentzian or Euclidean conformal "Kaehler" geometries, including the Plebanski-Demianski…
Gravitational Instantons and special geometry
Steffen Aksteiner, Lars Andersson
The Chen-Teo gravitational instanton is an asymptotically flat, toric, Ricci flat family of metrics on , that provides a counterexample to the…
On the geometry of Petrov type II spacetimes
Steffen Aksteiner, Lars Andersson, Bernardo Araneda +1
In general, geometries of Petrov type II do not admit symmetries in terms of Killing vectors or spinors. We introduce a weaker form of Killing equations which do admit solutions. I…
Compatibility complex for black hole spacetimes
Steffen Aksteiner, Lars Andersson, Thomas Bäckdahl +2
The set of local gauge invariant quantities for linearized gravity on the Kerr spacetime presented by two of the authors (S.A, T.B.) in (arXiv:1803.05341) is shown to be complete.…
All local gauge invariants for perturbations of the Kerr spacetime
Steffen Aksteiner, Thomas Bäckdahl
We present two complex scalar gauge invariants for perturbations of the Kerr spacetime defined covariantly in terms of the Killing vectors and the conformal Killing-Yano tensor of…