Research Interests:
Research Interests:
New expressionsforthem ultipolem om entsofan isolated post-Newtonian source,in theform of surface integrals in the outernear-zone,are derived. Asan application we com pute the \source" quadrupole m om ent ofa Schwarzschild solution... more
New expressionsforthem ultipolem om entsofan isolated post-Newtonian source,in theform of surface integrals in the outernear-zone,are derived. Asan application we com pute the \source" quadrupole m om ent ofa Schwarzschild solution boosted to uniform velocity,at the third postNewtonian (3PN) order. W e show that the consideration ofthis boosted Schwarzschild solution (BSS)isenough to uniquely determ ineoneoftheam biguity param etersin therecentcom putation ofthegravitationalwavegeneration by com pactbinariesat3PN order: = 7=33.W earguethat thisvalueistheonly oneforwhich thePoincar e invarianceofthe3PN wave generation form alism is realized. As a check,we con rm the value of by a di erent m ethod,based on the far-zone expansion oftheBSS at xed retarded tim e,and a calculation oftherelevantnon-linearm ultipole interactionsin the externalm etric atthe 3PN order. PACS num bers:04.25.-g,04.30.-w Electronicaddress:blanchet@ iap.fr Electronicaddress:dam our@ ihes.fr Electronicaddress:...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
The parameters of inspiraling compact binaries can be estimated using matched filtering of gravitational-waveform templates against the output of laser-interferometric gravitational-wave detectors. The estimates are most sensitive to the... more
The parameters of inspiraling compact binaries can be estimated using matched filtering of gravitational-waveform templates against the output of laser-interferometric gravitational-wave detectors. The estimates are most sensitive to the accuracy with which the phases of the ...
Research Interests:
Anisotropic emission of gravitational waves (GWs) from inspiralling compact binaries leads to the loss of linear momentum and hence gravitational recoil of the system. The loss rate of linear momentum in the far-zone of the source (a... more
Anisotropic emission of gravitational waves (GWs) from inspiralling compact binaries leads to the loss of linear momentum and hence gravitational recoil of the system. The loss rate of linear momentum in the far-zone of the source (a nonspinning binary system of black ...
Research Interests:
Current expectations on the signal-to-noise ratios and masses of supermassive black holes which the Laser Interferometer Space Antenna (LISA) can observe are based on using in matched filtering only the dominant harmonic of the inspiral... more
Current expectations on the signal-to-noise ratios and masses of supermassive black holes which the Laser Interferometer Space Antenna (LISA) can observe are based on using in matched filtering only the dominant harmonic of the inspiral waveform at twice the orbital ...
Research Interests:
Research Interests:
Research Interests:
The multipolar-post-Minkowskian approach to gravitational radiation is applied to the problem of the generation of waves by the compact binary inspiral. We investigate specifically the third post-Newtonian (3PN) approximation in the total... more
The multipolar-post-Minkowskian approach to gravitational radiation is applied to the problem of the generation of waves by the compact binary inspiral. We investigate specifically the third post-Newtonian (3PN) approximation in the total energy flux. The new results are the computation of the mass quadrupole moment of the binary to the 3PN order, and the current quadrupole and mass octupole to the 2PN order. Wave tails and tails of tails in the far zone are included up to the 3.5PN order. The recently derived 3PN equations of binary motion are used to compute the time-derivatives of the moments. We find perfect agreement to the 3.5PN order with perturbation calculations of black holes in the test-mass limit for one body. Technical inputs in our computation include a model of point particles for describing the compact objects, and the Hadamard self-field regularization. Because of a physical incompleteness of the Hadamard regularization at the 3PN order, the energy flux depends on one unknown physical parameter, which is a combination of a parameter \lambda in the equations of motion, and a new parameter \theta coming from the quadrupole moment.
Research Interests: General Relativity, Relativistic cosmology, Data Analysis, Black Holes, Parameter estimation, and 14 moreMeasurement Error, Spin-Orbit Coupling, Matched Filter, Black Hole, Primordial Black Hole, Equation of Motion, Speed of Light, Large Scale, Energy Flux, Perturbation Theory, Elementary Particles, parameter space, Angular Momentum, and gravitational wave
Research Interests:
Research Interests:
Research Interests:
Research Interests:
ABSTRACT
Research Interests:
Over the last decade gravitational waveforms of binary black holes have been investigated using a variety of approaches like the Multipolar post-Minkowskian formalism, Numerical Relativity and the Effective-One-Body method. We review... more
Over the last decade gravitational waveforms of binary black holes have been investigated using a variety of approaches like the Multipolar post-Minkowskian formalism, Numerical Relativity and the Effective-One-Body method. We review these complementary approaches and summarize the current status of these investigations of relevance to construct the best templates for the next generation Advanced gravitational wave detectors.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
In this article we summarise the proceedings of the Workshop on Gravitational Waves held during ICGC-95. In the first part we present the discussions on 3PN calculations (L. Blanchet, P. Jaranowski), black hole perturbation theory (M.... more
In this article we summarise the proceedings of the Workshop on Gravitational Waves held during ICGC-95. In the first part we present the discussions on 3PN calculations (L. Blanchet, P. Jaranowski), black hole perturbation theory (M. Sasaki, J. Pullin), numerical relativity (E. Seidel), data analysis (B.S. Sathyaprakash), detection of gravitational waves from pulsars (S. Dhurandhar), and the limit on rotation of relativistic stars (J. Friedman). In the second part we briefly discuss the contributed papers which were mainly on detectors and detection techniques of gravitational waves.
Research Interests:
Abstract. The weak, field-low velocity approximation of Dirac equation in Kerr space-time is investigated. The interaction terms admit of an interpretation in terms of a ' dipole-dipole' interaction in addition... more
Abstract. The weak, field-low velocity approximation of Dirac equation in Kerr space-time is investigated. The interaction terms admit of an interpretation in terms of a ' dipole-dipole' interaction in addition to coupling of spin with the angu-lar momentum of the rotating source. The ...
Research Interests:
Research Interests:
The techniques of second quantization in Kerr metric for the scalar and neutrino (massless) fields are extended to the massive spin half case. The normal modes of Dirac field in Kerr metric are obtained in Chandrasekhar’s representation... more
The techniques of second quantization in Kerr metric for the scalar and neutrino (massless) fields are extended to the massive spin half case. The normal modes of Dirac field in Kerr metric are obtained in Chandrasekhar’s representation and the field is quantized as usual by imposing equal-time anti-commutation relations. The vacuum expectation value of energy-momentum tensor is evaluated asymptotically, leading
Research Interests:
We show that the upper bound on the entropy of a finite system proposed by Qadir is not universal and consequently neither interesting nor relevant to the Bekenstein-Unruh-Wald debate.
Research Interests:
ABSTRACT
Research Interests:
(Some reference links may require a separate subscription.) ... A. Zee, Phys. Rev. Lett. 55, 2379 (1985) [SPIN];[INSPEC];[CAS];[SPIRES];[MEDLINE]; 56, 1101 (E) (1986) . ... J. Samuel and BR Iyer, "A Gravitational Analog of... more
(Some reference links may require a separate subscription.) ... A. Zee, Phys. Rev. Lett. 55, 2379 (1985) [SPIN];[INSPEC];[CAS];[SPIRES];[MEDLINE]; 56, 1101 (E) (1986) . ... J. Samuel and BR Iyer, "A Gravitational Analog of the Dirac Monopole" (to be published).