Simulation of a black-hole–neutron-star merger (GW200115)

This animation shows a simulation of a black-hole–neutron-star merger, compatible with GW200115. In agreement with the non-detection of an electromagnetic counterpart, the neutron star is swallowed by the black hole without being tidally disrupted. Therefore, no noticeable accretion disk forms around the black hole during the merger process. The animation shows the gravitational wave signal in blue, and the density of the neutron stars from yellow to orange (yellow representing lower densities, orange representing higher densities). We also show the gravitational wave strain in the bottom part of the video, indicating the time evolution. Numerical relativity simulation: S.V. Chaurasia (Stockholm University), T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics) Scientific visualization: T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics), N. Fischer, S. Ossokine, H. Pfeiffer (Max Planck Institute for Gravitational Physics) Acknowledgments We acknowledge support through the High-Performance Computing Center Stuttgart (HLRS) through project GWanalysis (project 44189) for HAWK, through the Norddeutsche Verbund für Hoch- und Höchstleistungsrechnen (project bbp00049), and through the PDC Center for High Performance Computing (SNIC 2020/1-34 and SNIC 2020/3-25) for Beskow. This support enables our simulations of black hole–neutron star systems