Showing 2007Show all

170 papers · 1 filter

gr-qc2007★ 49 cited

Comparison between numerical relativity and a new class of post-Newtonian gravitational-wave phase evolutions: the non-spinning equal-mass case

Achamveedu Gopakumar, Mark Hannam, Sascha Husa +1

We compare the phase evolution of equal-mass nonspinning black-hole binaries from numerical relativity (NR) simulations with post-Newtonian (PN) results obtained from three PN appr…

gr-qc2007★ 28 cited

Cylindrical spacetimes with a cosmological constant and their sources

M. Zofka, J. Bicak

We review and investigate some basic properties of static, cylindrically symmetric spacetimes with non-zero cosmological constant, find non-singular sheet sources of these spacetim…

gr-qc2007★ 9 cited

A numerical study of Penrose-like inequalities in a family of axially symmetric initial data

J. L. Jaramillo, N. Vasset, M. Ansorg

Our current picture of black hole gravitational collapse relies on two assumptions: i) the resulting singularity is hidden behind an event horizon -- weak cosmic censorship conject…

gr-qc2007★ 70 cited

The cross-correlation search for periodic gravitational waves

Sanjeev Dhurandhar, Badri Krishnan, Himan Mukhopadhyay +1

In this paper we study the use of cross-correlations between multiple gravitational wave (GW) data streams for detecting long-lived periodic signals. Cross-correlation searches bet…

gr-qc2007★ 21 cited

Fundamental properties and applications of quasi-local black hole horizons

Badri Krishnan

The traditional description of black holes in terms of event horizons is inadequate for many physical applications, especially when studying black holes in non-stationary spacetime…

math-ph2007★ 19 cited

Linear and nonlinear tails II: exact decay rates in spherical symmetry

Nikodem Szpak, Piotr Bizoń, Tadeusz Chmaj +1

We derive the exact late-time asymptotics for small spherically symmetric solutions of nonlinear wave equations with a potential. The dominant tail is shown to result from the comp…

gr-qc2007★ 159 cited

Hyperboloidal foliations and scri-fixing

Anıl Zenginoğlu

We discuss a gauge choice which allows us to avoid the introduction of artificial timelike outer boundaries in numerical studies of test fields based on a 3+1 decomposition of asym…

gr-qc2007★ 121 cited

Comparison between numerical-relativity and post-Newtonian waveforms from spinning binaries: the orbital hang-up case

Mark Hannam, Sascha Husa, Bernd Brügmann +1

We compare results from numerical simulations of spinning binaries in the "orbital hangup" case, where the binary completes at least nine orbits before merger, with post-Newtonian…

gr-qc2007★ 225 cited

On the final spin from the coalescence of two black holes

Luciano Rezzolla, Enrico Barausse, Ernst Nils Dorband +4

We provide a compact analytic formula to compute the spin of the black hole produced by the coalescence of two black holes. The expression, which uses an analytic fit of numerical-…

hep-th2007★ 16 cited

Gluon Scattering in Deformed N=4 SYM

Yaron Oz, Stefan Theisen, Shimon Yankielowicz

We consider gluon and gluino scattering amplitudes in large N beta-deformed N=4 SYM with real beta. A direct inspection of the planar diagrams shows that the scattering amplitudes…

gr-qc2007★ 149 cited

Faithful Effective-One-Body waveforms of equal-mass coalescing black-hole binaries

Thibault Damour, Alessandro Nagar, Ernst Nils Dorband +2

We continue the program of constructing, within the Effective-One-Body (EOB) approach, high-accuracy analytic waveforms describing the signal emitted by inspiralling and coalescing…

hep-th2007★ 96 cited

A Generalized Scaling Function for AdS/CFT

Lisa Freyhult, Adam Rej, Matthias Staudacher

We study a refined large spin limit for twist operators in the sl(2) sector of AdS/CFT. We derive a novel non-perturbative equation for the generalized two-parameter scaling functi…

gr-qc2007★ 63 cited

Search of S3 LIGO data for gravitational wave signals from spinning black hole and neutron star binary inspirals

The LIGO Scientific Collaboration, B. Abbott

We report on the methods and results of the first dedicated search for gravitational waves emitted during the inspiral of compact binaries with spinning component bodies. We analyz…

physics.gen-ph2007★ 11 cited

A General Relativistic Rotating Evolutionary Universe

Marcelo Samuel Berman

We show that when we work with coordinate cosmic time, which is not proper time, Robertson-Walker's metric, includes a possible rotational state of the Universe. An exact formula f…

astro-ph2007★ 184 cited

Implications for the Origin of GRB 070201 from LIGO Observations

LIGO Scientific Collaboration, K. Hurley

We analyzed the available LIGO data coincident with GRB 070201, a short duration hard spectrum gamma-ray burst whose electromagnetically determined sky position is coincident with…

gr-qc2007★ 64 cited

Report on the second Mock LISA Data Challenge

Stanislav Babak, John G. Baker, Matthew J. Benacquista +40

The Mock LISA Data Challenges are a program to demonstrate LISA data-analysis capabilities and to encourage their development. Each round of challenges consists of several data set…

hep-ph2007★ 23 cited

Cascading to the MSSM

Jonathan J. Heckman, Cumrun Vafa, Herman Verlinde +1

The MSSM can arise as an orientifold of a pyramid-like quiver in the context of intersecting D-branes. Here we consider quiver realizations of the MSSM which can emerge at the bott…

gr-qc2007★ 12 cited

Automorphisms in Loop Quantum Gravity

Benjamin Bahr, Thomas Thiemann

We investigate a certain distributional extension of the group of spatial diffeomorphisms in Loop Quantum Gravity. This extension, which is given by the automorphisms Aut(P) of the…

gr-qc2007★ 20 cited

Phase and alignment noise in grating interferometers

A. Freise, A. Bunkowski, R. Schnabel

Diffraction gratings have been proposed as core optical elements in future laser-interferometric gravitational-wave detectors. In this paper we derive equations for the coupling be…

gr-qc2007★ 4 cited

Analytic approximations, perturbation methods, and their applications

P. Jaranowski, K. G. Arun, L. Barack +33

The paper summarizes the parallel session B3 {\em Analytic approximations, perturbation methods, and their applications} of the GR18 conference. The talks in the session reported n…

hep-th2007★ 25 cited

Yangian Symmetry of Long-Range gl(N) Integrable Spin Chains

Niklas Beisert, Denis Erkal

An interesting type of spin chain has appeared in the context of the planar AdS/CFT correspondence: It is based on an integrable nearest-neighbor spin chain, and it is perturbative…

gr-qc2007★ 15 cited

Blowup of Jang's equation at outermost marginally trapped surfaces

Jan Metzger

The aim of this paper is to collect some facts about the blowup of Jang's equation. First, we discuss how to construct solutions that blow up at an outermost MOTS. Second, we exclu…

gr-qc2007★ 11 cited

Verifying black hole orbits with gravitational spectroscopy

Steve Drasco

Gravitational waves from test masses bound to geodesic orbits of rotating black holes are simulated, using Teukolsky's black hole perturbation formalism, for about ten thousand gen…

gr-qc2007★ 121 cited

The influence of the hydrodynamic drag from an accretion torus on extreme mass-ratio inspirals

E. Barausse, L. Rezzolla

We have studied extreme mass-ratio inspirals (EMRIs) in spacetimes containing a rotating black hole and a non self-gravitating torus with constant specific angular momentum. We hav…