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LIGO: the laser interferometer gravitationalwave observatory Rep.
 Prog. Phys.
, 2009
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The basics of gravitational wave theory
 New J. Phys
, 2005
"... Abstract. Einstein’s special theory of relativity revolutionized physics by teaching us that space and time are not separate entities, but join as “spacetime”. His general theory of relativity further taught us that spacetime is not just a stage on which dynamics takes place, but is a participant: T ..."
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Cited by 11 (1 self)
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Abstract. Einstein’s special theory of relativity revolutionized physics by teaching us that space and time are not separate entities, but join as “spacetime”. His general theory of relativity further taught us that spacetime is not just a stage on which dynamics takes place, but is a participant: The field equation of general relativity connects matter dynamics to the curvature of spacetime. Curvature is responsible for gravity, carrying us beyond the Newtonian conception of gravity that had been in place for the previous two and a half centuries. Much research in gravitation since then has explored and clarified the consequences of this revolution; the notion of dynamical spacetime is now firmly established in the toolkit of modern physics. Indeed, this notion is so well established that we may now contemplate using spacetime as a tool for other science. One aspect of dynamical spacetime — its radiative character, “gravitational radiation ” — will inaugurate entirely new techniques for observing violent astrophysical processes. Over the next one hundred years, much of this subject’s excitement will come from learning how to exploit spacetime as a tool for astronomy. This article is intended as a tutorial in the basics of gravitational radiation physics. 1. Introduction: Spacetime and
Relic Backgrounds of Gravitational Waves from Cosmic Turbulence
, 2002
"... Turbulence may have been produced in the early universe during several kind of nonequilibrium processes. Periods of cosmic turbulence may have left a detectable relic in the form of stochastic backgrounds of gravitational waves. In this paper we derive general expressions for the power spectrum of ..."
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Turbulence may have been produced in the early universe during several kind of nonequilibrium processes. Periods of cosmic turbulence may have left a detectable relic in the form of stochastic backgrounds of gravitational waves. In this paper we derive general expressions for the power spectrum of the expected signal. Extending previous works on the subject, we take into account the effects of a continuous energy injection power and of magnetic fields. Both effects lead to considerable deviations from the Kolmogorov turbulence spectrum. We applied our results to determine the spectrum of gravity waves which may have been produced by neutrino inhomogeneous diffusion and by a first order phase transition. We show that in both cases the expected signal may be in the sensitivity range of LISA. 1
Gravitational waves from an early matter era
, 2009
"... We investigate the generation of gravitational waves due to the gravitational instability of primordial density perturbations in an early matterdominated era which could be detectable by experiments such as LIGO and LISA. We use relativistic perturbation theory to give analytic estimates of the ten ..."
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We investigate the generation of gravitational waves due to the gravitational instability of primordial density perturbations in an early matterdominated era which could be detectable by experiments such as LIGO and LISA. We use relativistic perturbation theory to give analytic estimates of the tensor perturbations generated at second order by linear density perturbations. We find that large enhancement factors with respect to the naive secondorder estimate are possible due to the growth of density perturbations on subHubble scales. However very large enhancement factors coincide with a breakdown of linear theory for density perturbations on small scales. To produce a primordial gravitational wave background that would be detectable with LIGO or LISA from density perturbations in the linear regime requires primordial comoving curvature perturbations on small scales of order 0.02 for Advanced LIGO or 0.005 for LISA, otherwise numerical calculations of the nonlinear evolution on subHubble scales are required. 1
0 SemiAnalytic Calculation of the Gravitational Wave Signal From the Electroweak Phase Transition for General Quartic Scalar Effective Potentials
, 2010
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New Journal of Physics The basics of gravitational wave theory
"... The basics of gravitational wave theory This article has been downloaded from IOPscience. Please scroll down to see the full text article. ..."
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The basics of gravitational wave theory This article has been downloaded from IOPscience. Please scroll down to see the full text article.
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, 2010
"... The LIGOVirgo network of kilometerscale laser interferometric gravitationalwave detectors reached a major milestone with the successful operation of LIGO's fifth (S5) and Virgo's first (VSR1) science runs during 20052007. This thesis presents several issues related to gravitationalwav ..."
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The LIGOVirgo network of kilometerscale laser interferometric gravitationalwave detectors reached a major milestone with the successful operation of LIGO's fifth (S5) and Virgo's first (VSR1) science runs during 20052007. This thesis presents several issues related to gravitationalwave transient detection from the perspective of the joint allsky, untriggered burst search over S5/VSR1 data. Existing searches for gravitationalwave bursts must deal with the presence of nonGaussian noise transients which populate the data over the majority of sensitive signal space. These events may be confused with true signals, and are the current limiting factor in search sensitivity and detection confidence for any real event. The first part of this thesis focuses on the development of tools to identify, monitor and characterize these instrumental disturbances in LIGO and Virgo data. An automated procedure is developed and applied to the S5/VSR1 search in order to safely remove noise transients from the analysis without sacrificing sensitivity by making use of the wealth of auxiliary information recorded by the detectors.
The Newtonian and Relativistic Theory of Orbits and the Emission of Gravitational Waves
, 2011
"... Abstract: This review paper is devoted to the theory of orbits. We start with the discussion of the Newtonian problem of motion then we consider the relativistic problem of motion, in particular the postNewtonian (PN) approximation and the further gravitomagnetic corrections. Finally by a classific ..."
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Abstract: This review paper is devoted to the theory of orbits. We start with the discussion of the Newtonian problem of motion then we consider the relativistic problem of motion, in particular the postNewtonian (PN) approximation and the further gravitomagnetic corrections. Finally by a classification of orbits in accordance with the conditions of motion, we calculate the gravitational waves luminosity for different types of stellar encounters and orbits.