Initial data for high-compactness black hole-neutron star binaries

摘要: For highly compact neutron stars, constructing numerical initial data for black hole-neutron star binary evolutions is very difficult. We describe improvements to an earlier method that enable it handle these more challenging cases. examine the case of a 6:1 mass ratio system in inspiral close merger, where governed by polytropic $\Gamma=2$, SLy, or LS220 equation state. In particular, we are able obtain solution with realistic state compactness 0.26 and 1.98 $M_\odot$, which representative highest reliably determined masses. SLy state, can solutions comparable 0.25, while family equations up 0.21, largest stable this family. These values significantly higher than any previously published results. find adapting computational domain surface accounting center drift key ingredients allowing us solutions.