Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques

Details Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques

2010-08-25

arxiv.org/abs/1008.4360v2

Phys.Rev.D82:104057,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

31 pages, 33 figures revtex 4, Published version. Several fixes throughout

Scientific paper

10.1103/PhysRevD.82.104057

We describe in detail full numerical and perturbative techniques to compute the gravitational radiation from intermediate-mass-ratio black-hole-binary inspirals and mergers. We perform a series of full numerical simulations of nonspinning black holes with mass ratios q=1/10 and q=1/15 from different initial separations and for different finite-difference resolutions. In order to perform those full numerical runs, we adapt the gauge of the moving punctures approach with a variable damping term for the shift. We also derive an extrapolation (to infinite radius) formula for the waveform extracted at finite radius. For the perturbative evolutions we use the full numerical tracks, transformed into the Schwarzschild gauge, in the source terms of the Regge-Wheller-Zerilli Schwarzschild perturbations formalism. We then extend this perturbative formalism to take into account small intrinsic spins of the large black hole, and validate it by computing the quasinormal mode frequencies, where we find good agreement for spins |a/M|<0.3. Including the final spins improves the overlap functions when comparing full numerical and perturbative waveforms, reaching 99.5% for the leading (l,m)=(2,2) and (3,3) modes, and 98.3% for the nonleading (2,1) mode in the q=1/10 case, which includes 8 orbits before merger. For the q=1/15 case, we obtain overlaps near 99.7% for all three modes. We discuss the modeling of the full inspiral and merger based on a combined matching of post-Newtonian, full numerical, and geodesic trajectories.

Affiliated with

Also associated with

No associations

Rating

Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermediate-mass-ratio black hole binaries: intertwining numerical and perturbative techniques will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-703115