The present status of the quasi-local mass, energy-momentum and angular-momentum
constructions in general relativity is reviewed. First, the general ideas, concepts, and …

The Kerr-Newman metric describes a very special rotating, charged mass and is the most
general of the asymptotically flat stationary'black hole'solutions to the Einstein-Maxwell …

This paper defines an angular velocity for time-dependent functions on the sphere and
applies it to gravitational waveforms from compact binaries. Because it is geometrically …

A priori, there is nothing very special about shear-free or asymptotically shear-free null
geodesic congruences. Surprisingly, however, they turn out to possess a large number of …

We present a detailed study of the center-of-mass (cm) motion seen in simulations produced
by the Simulating eXtreme Spacetimes (SXS) collaboration. We investigate potential …

The spin-coefficient formalism (SC formalism)(also known in the literature as Newman-
Penrose formalism (NP formalism)) is a commonly used technique based on the use of null …

Robinson-Trautman solutions with nonlinear electrodynamics are investigated for both L (F)
and L (F, G) Lagrangians, and the presence of electric and magnetic charges as well as …

Twistors appear to provide a satisfactory treatment of angular momentum for gravitationally
radiating systems. The approach is manifestly Bondi-Metzner-Sachs (BMS) invariant, and …

The Kerr-Newman metric describes a very special rotating, charged mass and is the most
general of the asymptotically flat stationaryblack hole'solutions to the Einstein-Maxwell …

The Brown-York quasilocal energy of a charged rotating black hole described by the Kerr-
Newman metric and enclosed by a fixed-radius surface is computed. No further assumptions …