CM3 - Dynamics of Compact Binaries |
Speaker_ |
Pollney, Denis |
Talk _ |
Accurate black hole binary evolutions. |
Abstract _ |
In the past year, black hole evolutions in numerical relativity have made significant strides forward in terms of the ability to evolve binaries for periods of more than an orbit. The use of mesh refinement techniques have finally allowed us to apply sufficient resolution to the problem. In addtion, the previous commonly applied paradigm of co-rotating grids and excision techniques, have been replaced by moving punctures. While this has resulted in unprecedented evolution timescales, it is important to critically examine these new techniques and in particular their consistency with alternate methods. This talks describes recent results obtained with the AEI-LSU BSSN evolution code, demonstrating orbital evolutions which can be compared with previously applied fixed-BH excision methods. In the case of moving punctures, gravitational waveforms can be extracted using both Weyl scalars and Zerilli-based techniques, and show good consistency in the waveform and radiated energies. |