Evolution of Binary BlackHole Spacetimes
Abstract
We describe early success in the evolution of binary blackhole spacetimes with a numerical code based on a generalization of harmonic coordinates. Indications are that with sufficient resolution this scheme is capable of evolving binary systems for enough time to extract information about the orbit, merger, and gravitational waves emitted during the event. As an example we show results from the evolution of a binary composed of two equal mass, nonspinning black holes, through a single plunge orbit, merger, and ringdown. The resultant black hole is estimated to be a Kerr black hole with angular momentum parameter a≈0.70. At present, lack of resolution far from the binary prevents an accurate estimate of the energy emitted, though a rough calculation suggests on the order of 5% of the initial rest mass of the system is radiated as gravitational waves during the final orbit and ringdown.
 Publication:

Physical Review Letters
 Pub Date:
 September 2005
 DOI:
 10.1103/PhysRevLett.95.121101
 arXiv:
 arXiv:grqc/0507014
 Bibcode:
 2005PhRvL..95l1101P
 Keywords:

 04.25.Dm;
 04.30.Db;
 04.70.Bw;
 Numerical relativity;
 Wave generation and sources;
 Classical black holes;
 General Relativity and Quantum Cosmology;
 Astrophysics;
 High Energy Physics  Theory
 EPrint:
 4 pages, 3 figures