Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-07-17
Phys.Rev.D76:124002,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
24 pages, 15 figures, 5 tables
Scientific paper
10.1103/PhysRevD.76.124002
Binary black-hole systems with spins aligned with the orbital angular momentum are of special interest, as studies indicate that this configuration is preferred in nature. If the spins of the two bodies differ, there can be a prominent beaming of the gravitational radiation during the late plunge, causing a recoil of the final merged black hole. We perform an accurate and systematic study of recoil velocities from a sequence of equal-mass black holes whose spins are aligned with the orbital angular momentum, and whose individual spins range from a = +0.584 to -0.584. In this way we extend and refine the results of a previous study and arrive at a consistent maximum recoil of 448 +- 5 km/s for anti-aligned models as well as to a phenomenological expression for the recoil velocity as a function of spin ratio. This relation highlights a nonlinear behavior, not predicted by the PN estimates, and can be readily employed in astrophysical studies on the evolution of binary black holes in massive galaxies. An essential result of our analysis is the identification of different stages in the waveform, including a transient due to lack of an initial linear momentum in the initial data. Furthermore we are able to identify a pair of terms which are largely responsible for the kick, indicating that an accurate computation can be obtained from modes up to l=3. Finally, we provide accurate measures of the radiated energy and angular momentum, finding these to increase linearly with the spin ratio, and derive simple expressions for the final spin and the radiated angular momentum which can be easily implemented in N-body simulations of compact stellar systems. Our code is calibrated with strict convergence tests and we verify the correctness of our measurements by using multiple independent methods whenever possible.
Ansorg Marcus
Deris Barrett
Diener Peter
Dorband Ernst Nils
Koppitz Michael
No associations
LandOfFree
Recoil velocities from equal-mass binary black-hole mergers: a systematic investigation of spin-orbit aligned configurations 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 Recoil velocities from equal-mass binary black-hole mergers: a systematic investigation of spin-orbit aligned configurations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recoil velocities from equal-mass binary black-hole mergers: a systematic investigation of spin-orbit aligned configurations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-563188