ing compact objects (such as neutron stars and black holes) with more accuracy than can ... equations for binary black hole/neutron star coalescence to en- ...

The future space-based gravitational wave detector LISA will be able to measure parameters of coalescing massive black hole binaries, often to extremely high accuracy. Previous work has demonstrated that the black hole spins can have a strong impact on the accuracy of parameter measurement. ...

Binary black-hole systems with spins aligned or anti-aligned to the orbital angular momentum, and which therefore do not exhibit precession effects, provide the natural ground to start detailed studies of the influence of strong-field spin effects on gravitational-wave observations of coalescing binaries. Furthermore, such systems may ...

We update the analytical estimate of the final spin of a coalescing black-hole binary derived within the effective-one-body (EOB) approach. We consider unequal-mass nonspinning black-hole binaries. It is found that a more complete account of relevant physical effects (higher post-Newtonian ...

X-ray binaries - mass-transferring binary stellar systems with compact object accretors - are unique astrophysical laboratories. They carry information about many complex physical processes such as star formation, compact object formation, and evolution of interacting binaries. My thesis work involves the study of the formation and ...

The final merger and coalescence of binary black holes is a key source of strong gravitational waves

Coalescing binary black hole mergers are expected to be the strongest gravitational wave sources for

We present gravitational waveforms for the last orbits and merger of black-hole-binary systems along two branches of the black-hole-binary parameter space: equal-mass binaries with equal nonprecessing spins, and nonspinning unequal-mass binaries. The waveforms are calculated from numerical solutions of Einstein�s ...

Observations of the inspiral of massive binary black holes (BBH) in the Laser Interferometer Space Antenna (LISA) and stellar mass binary black holes in the European Gravitational Wave Observatory (EGO) offer an unique opportunity to test the nonlinear structure of general relativity. For a ...

Pulsar timing arrays act to detect gravitational waves (GWs) by observing the small, correlated effect the waves have on pulse arrival times at the Earth. We find that pulsar timing observations of GWs are able to determine the sky position and other parameters of supermassive black hole binaries with extreme accuracy, given the ...

A new numerical method to construct binary black hole/neutron star initial data is presented. The method uses three spherical coordinate patches; two of these are centered at the binary compact objects and cover a neighborhood of each object; the third patch extends to the asymptotic region. As in the Komatsu-Eriguchi-Hachisu method, ...

Gravitational waves from compact binaries containing neutron stars may provide an important source of information regarding the neutron star equation of state. In contrast to binary neutron star inspirals where finite size effects are observed from tidal interactions and post-merger oscillations, the main finite size effect in black ...

A general method is presented for estimating the uncertainty in hybrid models of gravitational waveforms from binary black-hole systems with arbitrary physical parameters, and thence the highest allowable initial orbital frequency for a numerical-relativity simulation such that the combined analytical and numerical waveform meets some minimum desired ...

The angular accuracy of a search radar depends on the extraction technique. For the case of a binary moving window extractor, the accuracy is evaluated in different operational conditions including target scintillation. A beam-splitting technique that was devised to improve the accuracy is also evaluated and ...

... New Evidence for a Black Hole in the Compact Binary Cygnus X-3 ... Nor is it even clear whether its is a neutron star or a black hole. ...

... Title : New Evidence for a Black Hole in the Compact Binary Cygnus X-3. ... Nor is it even clear whether its is a neutron star or a black hole. ...

... Keywords. Black hole physics � gravitational waves � galaxies: active � radio continuum: galaxies ... Compact supermassive binary black holes 271 ...

... A Compact Supermassive Binary Black Hole System ... This is the closest black hole pair yet found by more than two orders of magnitude. ...

... Title : A Compact Supermassive Binary Black Hole System. ... This is the closest black hole pair yet found by more than two orders of magnitude. ...

Recent years have seen tremendous progress in numerical relativity and an ever improving performance of ground-based interferometric gravitational wave detectors. The numerical relativity and gravitational wave data analysis communities are collaborating to ascertain the most useful role for NR waveforms in the detection and characterization of binary ...

Tidal effects due to the presence of matter in binary neutron star inspiral cause the gravitational wave phase to accumulate more rapidly than in binary black hole inspiral. We report a comparison of numerical waveforms from an extended set of simulations of inspiraling neutron-star binaries, computed by ...

The stability of radio millisecond pulsars as celestial clocks allows for the possibility to detect and study the properties of gravitational waves (GWs) when the received pulses are timed jointly in a 'Pulsar Timing Array' (PTA) experiment. Here, we investigate the potential of detecting the GW from individual binary black hole systems using PTAs and ...

We present a straightforward approach for estimating the final black hole spin of a binary black hole coalescence with arbitrary initial masses and spins. Making some simple assumptions, we estimate the final angular momentum to be the sum of the individual spins plus the orbital angular momentum of a test particle orbiting at the last ...

In prior work, Chandra and Gemini-North observations of the eclipsing X-ray binary M33 X-7 have yielded measurements of the mass of its black hole primary and the system's orbital inclination angle of unprecedented accuracy. Likewise, the distance to the binary is known to a few percent. In an analysis ...

... Title : X-ray Bursts in Neutron Star and Black Hole Binaries from USA and RXTE Data: Detections and Upper Limits. Corporate ...

Following galactic merger, a binary black hole system ... Equation of motion for .... Einstein equations consist of a set of coupled nonlinear partial differential equations of mixed hyperbolic-elliptic ...

Multicolor orbital light curves of the black hole candidate binary A0620-00 are presented. The light

of the soft component. " Compare the > 20 keV HID of GRS 1758258 and other black hole binaries, as the HID of these sources has generally not been ...

... Abstract : We report on the discovery of a supermassive binary black-hole (SBBH) system in the radio galaxy 0402+379, with a projected separation ...

... ADA545553. Title : Hi Observations of the Supermassive Binary Black Hole System in 0402+379. Descriptive Note : Journal article. ...

... The most reliable evidence for the presence of a black hole in a binary system comes from determination of a mass function through optical ...

... Accession Number : ADA461931. Title : Galactic Black Hole Binaries: High-Energy Radiation. Corporate Author : NAVAL ...

Binary Black Holes, Accretion Disks and Relativistic. Jets: Photocenters of Nearby AGN and Quasars. Principal Investigator: Ann E. Wehrle (Interferometry ...

Mar 14, 2010... of our fascinating universe is featured, along with a brief explanation ... supermassive black holes are bound together by gravity in a binary ...

The increasing sophistication and accuracy of numerical simulations of compact binaries (especially binary black holes) presents the opportunity to test the regime in which post-Newtonian (PN) predictions for the emitted gravitational waves are accurate. In order to confront numerical results with those of ...

... Title : AN ASSESSMENT OF THE ACCURACY OF MEASUREMENT OF GYRO WANDER RATE ON THE BLACK KNIGHT STABILIZED PLATFORM ...

Spectral numerical methods are known for giving faster convergence than finite difference methods, when evolving smooth quantities. In binary black hole simulations of the SpEC code this exponential convergence is clearly visible. However, the same exponential dependence of the numerical error on the grid-resolution will also mean that a linear order ...

Einstein's theory of general relativity predicts existence of black holes and .... which the solutions from numerical evolutions can be obtained. ...