Showing 1999Show all

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hep-th1999★ 49 cited

On the relation between Euclidean and Lorentzian 2D quantum gravity

J. Ambjorn, J. Correia, C. Kristjansen +1

Starting from 2D Euclidean quantum gravity, we show that one recovers 2D Lorentzian quantum gravity by removing all baby universes. Using a peeling procedure to decompose the discr…

gr-qc1999★ 2 cited

Deep Surveys of Massive Black Holes with LISA

Alberto Vecchio

Massive black hole binary systems are among the most interesting sources for the Laser Interferometer Space Antenna (LISA); gravitational radiation emitted during the last year of…

hep-th1999★ 38 cited

Fundamental strings in Dp-Dq brane systems

J. Froehlich, O. Grandjean, A. Recknagel +1

We study conformal field theory correlation functions relevant for string diagrams with open strings that stretch between several parallel branes of different dimensions. In the fr…

hep-th1999★ 14 cited

On first order formulations of supergravities

B. Julia, S. Silva

Supergravities are usually presented in a so-called 1.5 order formulation. Here we present a general scheme to derive pure 1^{st} order formulations of supergravities from the 1.5…

hep-th1999★ 32 cited

On the Duality between Perturbative Heterotic Orbifolds and M-Theory on T^4/Z_N

V. Kaplunovsky, J. Sonnenschein, S. Theisen +1

The heterotic string compactified on an orbifold $T^4/\IZ_N$ has gauge group with (massless) states in its twisted sectors which are charged under both…

gr-qc1999

Gravitational waves from the r-modes of rapidly rotating neutron stars

Benjamin J. Owen

Since the last Amaldi meeting in 1997 we have learned that the r-modes of rapidly rotating neutron stars are unstable to gravitational radiation reaction in astrophysically realist…

gr-qc1999★ 11 cited

An efficient Matched Filtering Algorithm for the Detection of Continuous Gravitational Wave Signals

P. R. Williams, B. F. Schutz

We describe an efficient method of matched filtering over long (greater than 1 day) time baselines starting from Fourier transforms of short durations (roughly 30 minutes) of the d…

hep-th1999★ 13 cited

Quantum gravity corrections to the Schwarzschild mass

Marco Cavaglia, Carlo Ungarelli

Vacuum spherically symmetric Einstein gravity in dimensions can be cast in a two-dimensional conformal nonlinear sigma model form by first integrating on the -dimen…

gr-qc1999★ 16 cited

Numerical Relativity in 3+1 Dimensions

Bernd Bruegmann

Numerical relativity is finally approaching a state where the evolution of rather general (3+1)-dimensional data sets can be computed in order to solve the Einstein equations. Afte…

gr-qc1999★ 45 cited

Cauchy boundaries in linearized gravitational theory

Bela Szilagyi, Roberto Gomez, Nigel T. Bishop +1

We investigate the numerical stability of Cauchy evolution of linearized gravitational theory in a 3-dimensional bounded domain. Criteria of robust stability are proposed, develope…

gr-qc1999★ 81 cited

Pragmatic approach to gravitational radiation reaction in binary black holes

C. O. Lousto

We study the relativistic orbit of binary black holes in systems with small mass ratio. The trajectory of the smaller object (another black hole or a neutron star), represented as…

gr-qc1999★ 9 cited

Perturbative evolution of nonlinear initial data for binary black holes: Zerilli vs. Teukolsky

C. O. Lousto

We consider the problem of evolving nonlinear initial data in the close limit regime. Metric and curvature perturbations of nonrotating black holes are equivalent to first perturba…

gr-qc1999★ 1 cited

Are pre-big-bang models falsifiable by gravitational wave experiments?

C. Ungarelli, A. Vecchio

One of the most interesting predictions of string-inspired cosmological models is the presence of a stochastic background of relic gravitational waves in the frequency band accessi…

gr-qc1999★ 19 cited

Bondi-type systems near space-like and null infinity

Helmut Friedrich, Janos Kannar

We discuss how asymptotic quantities, originally introduced on null infinity in terms of Bondi-type gauge conditions, can be calculated near space-like infinity to any desired prec…

hep-th1999★ 13 cited

Yang-Mills Integrals

Werner Krauth, Jan Plefka, Matthias Staudacher

SU(N) Yang-Mills integrals form a new class of matrix models which, in their maximally supersymmetric version, are relevant to recent non-perturbative definitions of 10-dimensional…

gr-qc1999★ 225 cited

Gravitational wave astronomy

Bernard F Schutz

The first decade of the new millenium should see the first direct detections of gravitational waves. This will be a milestone for fundamental physics and it will open the new obser…

gr-qc1999★ 37 cited

Nonlinear and Perturbative Evolution of Distorted Black Holes. II. Odd-parity Modes

J Baker, S Brandt, M Campanelli +3

We compare the fully nonlinear and perturbative evolution of nonrotating black holes with odd-parity distortions utilizing the perturbative results to interpret the nonlinear resul…

gr-qc1999

Schlesinger system, Einstein equations and hyperelliptic curves

D. Korotkin, V. Matveev

We review recent developments in the method of algebro-geometric integration of integrable systems related to deformations of algebraic curves. In particular, we discuss the theta-…

hep-th1999★ 3 cited

The Finiteness Requirement for Six-Dimensional Euclidean Einstein Gravity

G. W. Gibbons, S. Ichinose

The finiteness requirement for Euclidean Einstein gravity is shown to be so stringent that only the flat metric is allowed. We examine counterterms in 4D and 6D Ricci-flat manifold…

hep-th1999★ 6 cited

Making the gravitational path integral more Lorentzian, or: Life beyond Liouville gravity

R. Loll, J. Ambjorn, K. N. Anagnostopoulos

In two space-time dimensions, there is a theory of Lorentzian quantum gravity which can be defined by a rigorous, non-perturbative path integral and is inequivalent to the well-kno…

hep-th1999★ 72 cited

Area law corrections from state counting and supergravity

Gabriel Lopes Cardoso, Bernard de Wit, Thomas Mohaupt

Modifications of the Bekenstein-Hawking area law for black holes are crucial in order to find agreement between the microscopic entropy based on state counting and the macroscopic…

gr-qc1999★ 73 cited

Bondi-type systems near space-like infinity and the calculation of the NP-constants

H. Friedrich, J. Kannar

We relate Bondi systems near space-like infinity to another type of gauge conditions. While the former are based on null infinity, the latter are defined in terms of Einstein propa…

solv-int1999★ 18 cited

Schlesinger transformations for elliptic isomonodromic deformations

D. Korotkin, N. Manojlovic, H. Samtleben

Schlesinger transformations are discrete monodromy preserving symmetry transformations of the classical Schlesinger system. Generalizing well-known results from the Riemann sphere…

astro-ph1999★ 4 cited

Slowly Rotating Two-Fluid Neutron Star Model

Reinhard Prix

We study stationary axisymmetric configurations of a star model consisting of two barotropic fluids, which are uniformly rotating at two different rotation rates. Analytic approxim…