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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…
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…
A template bank for gravitational waveforms from coalescing binary black holes: non-spinning binaries
P. Ajith, S. Babak, Y. Chen +15
Gravitational waveforms from the inspiral and ring-down stages of the binary black hole coalescences can be modelled accurately by approximation/perturbation techniques in general…
Implementation of standard testbeds for numerical relativity
M. C. Babiuc, S. Husa, D. Alic +8
We discuss results that have been obtained from the implementation of the initial round of testbeds for numerical relativity which was proposed in the first paper of the Apples wit…
Exploring black hole superkicks
Bernd Bruegmann, Jose Gonzalez, Mark Hannam +2
Recent calculations of the recoil velocity in black-hole binary mergers have found kick velocities of km/s for equal-mass binaries with anti-aligned initial spins in…
Reducing eccentricity in black-hole binary evolutions with initial parameters from post-Newtonian inspiral
Sascha Husa, Mark Hannam, Jose A. Gonzalez +2
Standard choices of quasi-circular orbit parameters for black-hole binary evolutions result in eccentric inspiral. We introduce a conceptually simple method, which is to integrate…
Reducing phase error in long numerical binary black hole evolutions with sixth order finite differencing
Sascha Husa, Jose A. Gonzalez, Mark Hannam +2
We describe a modification of a fourth-order accurate ``moving puncture'' evolution code, where by replacing spatial fourth-order accurate differencing operators in the bulk of the…
Where post-Newtonian and numerical-relativity waveforms meet
Mark Hannam, Sascha Husa, Jose A. Gonzalez +2
We analyze numerical-relativity (NR) waveforms that cover nine orbits (18 gravitational-wave cycles) before merger of an equal-mass system with low eccentricity, with numerical unc…
Head-On collisions of different initial data
Ulrich Sperhake, Bernd Bruegmann, Jose Gonzalez +2
We discuss possible origins for discrepancies observed in the radiated energies in head-on collisions of non-spinning binaries starting from Brill-Lindquist and superposed Kerr-Sch…
Phenomenological template family for black-hole coalescence waveforms
P. Ajith, S. Babak, Y. Chen +15
Recent progress in numerical relativity has enabled us to model the non-perturbative merger phase of the binary black-hole coalescence problem. Based on these results, we propose a…
Inspiral, merger and ringdown of unequal mass black hole binaries: a multipolar analysis
Emanuele Berti, Vitor Cardoso, Jose A. Gonzalez +4
We study the inspiral, merger and ringdown of unequal mass black hole binaries by analyzing a catalogue of numerical simulations for seven different values of the mass ratio (from…
Supermassive recoil velocities for binary black-hole mergers with antialigned spins
J. A. Gonzalez, M. D. Hannam, U. Sperhake +2
Recent calculations of the recoil velocity in binary black hole mergers have found the kick velocity to be of the order of a few hundred km/s in the case of non-spinning binaries a…
Binary black holes on a budget: Simulations using workstations
Pedro Marronetti, Wolfgang Tichy, Bernd Bruegmann +4
Binary black hole simulations have traditionally been computationally very expensive: current simulations are performed in supercomputers involving dozens if not hundreds of proces…