Results 21 to 30 of about 29,056 (316)
Pseudoplane-wave gravitational calibrator for gravitational wave observatories
Physical Review D, 2023 The precisions of existing gravitational calibrators for gravitational wave observatories are limited by their dependence on the relative position between the calibrators and the observatory's test masses. Here we present a novel geometry consisting of four quadrupole rotors placed at the vertices of a rectangle centered on the test mass.
M. P. Ross +10 more
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The Poincaré and BMS flux-balance laws with application to binary systems
Journal of High Energy Physics, 2020 Asymptotically flat spacetimes admit both supertranslations and Lorentz transformations as asymptotic symmetries. Furthermore, they admit super-Lorentz transformations, namely superrotations and superboosts, as outer symmetries associated with super ...
Geoffrey Compère +2 more
doaj +1 more source
Metric reconstruction from celestial multipoles
Journal of High Energy Physics, 2022 The most general vacuum solution to Einstein’s field equations with no incoming radiation can be constructed perturbatively from two infinite sets of canonical multipole moments, which are found to be mapped into each other under gravitational electric ...
Geoffrey Compère +2 more
doaj +1 more source
Gravitational breathing memory and dual symmetries
Journal of High Energy Physics, 2021 Brans-Dicke theory contains an additional propagating mode which causes homogeneous expansion and contraction of test bodies in transverse directions.
Ali Seraj
doaj +1 more source
Gravitational waves in the nonsymmetric gravitational theory [PDF]
Physics Letters A, 1993 We prove that the flux of gravitational radiation from an isolated source in the Nonsymmetric Gravitational Theory is identical to that found in Einstein's General Theory of Relativity.
Cornish, N. J. +2 more
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Evanescent gravitational waves [PDF]
Physical Review D, 2020 We describe the properties of evanescent gravitational waves (EGWs)---wave solutions of Einstein equations which decay exponentially in some direction while propagating in another. Evanescent waves are well-known in acoustics and optics and have recently received much attention due to their extraordinary properties such as their transverse spin and ...
Golat, Sebastian +2 more
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Multipole expansion of gravitational waves: from harmonic to Bondi coordinates
Journal of High Energy Physics, 2021 We transform the metric of an isolated matter source in the multipolar post-Minkowskian approximation from harmonic (de Donder) coordinates to radiative Newman-Unti (NU) coordinates.
Luc Blanchet +4 more
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A Search for Gravitational Waves from Perturbed Black Hole Ringdowns in LIGO Data [PDF]
, 2008 According to General Relativity a perturbed black hole will return to a stable configuration by the emission of gravitational radiation in a superposition of quasi-normal modes. Such a perturbation will occur due to the coalescence of a black hole binary,
Goggin, Lisa Maria
core +1 more source
Nuclear Physics B - Proceedings Supplements, 1994 In the last few years there have been a number of significant developments in research towards the detection of gravitational radiation from astronomical objects. The construction of 3 large-scale (3- or 4-km) interferometric detectors has been funded; new high-sensitivity bars are under construction; there is a serious proposal using two ...
openaire +4 more sources
Gyroscopic gravitational memory
Journal of High Energy Physics, 2023 We study the motion of a gyroscope located far away from an isolated gravitational source in an asymptotically flat spacetime. As seen from a local frame tied to distant stars, the gyroscope precesses when gravitational waves cross its path, resulting in
Ali Seraj, Blagoje Oblak
doaj +1 more source