Binary-black-hole initial data with nearly-extremal spins

Details Binary-black-hole initial data with nearly-extremal spins Binary-black-hole initial data with nearly-extremal spins

2008-05-27

arxiv.org/abs/0805.4192v3

Phys.Rev.D78:084017,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

10.1103/PhysRevD.78.084017

There is a significant possibility that astrophysical black holes with nearly-extremal spins exist. Numerical simulations of such systems require suitable initial data. In this paper, we examine three methods of constructing binary-black-hole initial data, focusing on their ability to generate black holes with nearly-extremal spins: (i) Bowen-York initial data, including standard puncture data (based on conformal flatness and Bowen-York extrinsic curvature), (ii) standard quasi-equilibrium initial data (based on the extended-conformal-thin-sandwich equations, conformal flatness, and maximal slicing), and (iii) quasi-equilibrium data based on the superposition of Kerr-Schild metrics. We find that the two conformally-flat methods (i) and (ii) perform similarly, with spins up to about 0.99 obtainable at the initial time. However, in an evolution, we expect the spin to quickly relax to a significantly smaller value around 0.93 as the initial geometry relaxes. For quasi-equilibrium superposed Kerr-Schild (SKS) data [method (iii)], we construct initial data with \emph{initial} spins as large as 0.9997. We evolve SKS data sets with spins of 0.93 and 0.97 and find that the spin drops by only a few parts in 10^4 during the initial relaxation; therefore, we expect that SKS initial data will allow evolutions of binary black holes with relaxed spins above 0.99. [Abstract abbreviated; full abstract also mentions several secondary results.]

Affiliated with

Also associated with

No associations

Rating

Binary-black-hole initial data with nearly-extremal spins 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 Binary-black-hole initial data with nearly-extremal spins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary-black-hole initial data with nearly-extremal spins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-274200