32 citations · 194 across the 28 of their papers we have counts for
3 papers · 1 filter
A geometric invariant characterising initial data for the Kerr-Newman spacetime
Michael J. Cole, Juan A. Valiente Kroon
We describe the construction of a geometric invariant characterising initial data for the Kerr-Newman spacetime. This geometric invariant vanishes if and only if the initial data s…
Zero rest-mass fields and the Newman-Penrose constants on flat space
Edgar Gasperin, Juan Antonio Valiente Kroon
Zero rest-mass fields of spin 1 (the electromagnetic field) and spin 2 propagating on flat space and their corresponding Newman-Penrose (NP) constants are studied near spatial infi…
Killing spinors as a characterisation of rotating black hole spacetimes
Michael J. Cole, Juan A. Valiente Kroon
We investigate the implications of the existence of Killing spinors in a spacetime. In particular, we show that in vacuum and electrovacuum a Killing spinor, along with some assump…