The radiation gauges used by Chrzanowski (his IRG/ORG) for metric reconstruction in the Kerr spacetime seem to be over-specified. Their specification consists of five conditions: four, which we treat here as valid gauge conditions, plus an additional condition on the trace of the metric perturbation. In this work, we utilize a newly developed form of the perturbed Einstein equations to establis...

Chairman: 1985-1993 J. Slanina (Netherlands); Secretary: 1987-1995 P. Warneck (Germany); Titular Members: H. Akimoto (Japan; 1987-1995); L. Barrie (Canada; 1991-1995); N. M. Bazhin (Russia; 1991-1995); R. H. Brown (UK; 1991-1995); X. Tang (China; 1987-1995); Associate Members: E. H. Adema (Netherlands; 1991-1995); J. G. Calvert (USA; 1991-1995); K. H. Eickel (Germany; 1989-1993); J. A. Kerr (UK...

Mark A. Scheel, Adrienne L. Erickcek, Lior M. Burko, Lawrence E. Kidder, Harald P. Pfeiffer, and Saul A. Teukolsky Theoretical Astrophysics 130-33, California Institute of Technology, Pasadena, California 91125, USA Department of Physics, Princeton University, Princeton, New Jersey 08544, USA Department of Physics, University of Utah, Salt Lake City, Utah 84112, USA Center for Radiophysics and ...

We show the existence of the full compound asymptotics of solutions to the scalar wave equation on long-range non-trapping Lorentzian manifolds modeled on the radial compactification of Minkowski space. In particular, we show that there is a joint asymptotic expansion at null and timelike infinity for forward solutions of the inhomogeneous equation. In two appendices we show how these results a...

We consider Quasi-Extremal Kerr and Quasi-Extremal Schwarzschild-de Sitter Black Holes. From the known analytical expressions obtained for their Quasi-Normal Modes frequencies, we suggest an area quan-tization prescription for those objects.

A combined model of the Kerr spinning particle and superparticle is considered. The structure of the Kerr geometry is presented in a complex form as being created by a complex source. A natural supergeneralization of this construction is obtained corresponding to a complex " supersource ". Peforming a supershift to the Kerr and Kerr-Sen solutions we obtain metrics of supergravity black holes wi...

We consider Quasi-Extreme Kerr and Quasi-Extreme Schwarzschild-de Sitter Black Holes. From the known analytical expressions obtained for their Quasi-Normal Modes frequencies, we suggest an area quan-tization prescription for those objects.

The magnetization reversal in square lattice cobalt antidot arrays with the applied field at 45° to the anti dot rows was investigated using Lorentz electron microscopy in the Fresnel mode. While the hysteresis loops from magneto-optical Kerr effect measurements only reflect the easy axis character of the reversal, several different reversal processes were identified in the Fresnel images depen...

We criticize and generalize some properties of Nöther charges presented in a paper by V. Iyer and R. M. Wald and their application to entropy of black holes. The first law of black holes thermodynamics is proven for any gauge-natural field theory. As an application charged Kerr-Newman solutions are considered. As a further example we consider a (1 + 2) black hole solution. 1