We experiment with several new modifications for the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formulation of the Einstein field equations and demonstrate how these modifications affect the stability of numerical black hole evolution calculations. With these modifications, we evolve both single non-rotating excised Kerr-Schild black holes and punctured binary black holes, and obtain accurate and stable simulations.
@article{arxiv.1205.5111,
title = {Modifications for numerical stability of black hole evolution},
author = {Hwei-Jang Yo and Chun-Yu Lin and Zhoujian Cao},
journal= {arXiv preprint arXiv:1205.5111},
year = {2015}
}