Berlin 2014 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 24: Numerical Relativity II
GR 24.1: Vortrag
Donnerstag, 20. März 2014, 17:15–17:35, SPA SR220
Mergers of binary neutron stars with realistic spin — •Tim Dietrich1, Sebastiano Bernuzzi1, Wolfgang Tichy2, and Bernd Brügmann1 — 1Theoretical Physics Institute, University of Jena, 07743 Jena, Germany — 2Department of Physics, Florida Atlantic University, Boca Raton, FL 33431 USA
Binary neutron star mergers are a primary source of gravitational waves. We present the first, fully nonlinear general relativistic dynamical evolutions of the last three orbits for constraint satisfying initial data of spinning neutron star binaries. The dynamics of the systems is analyzed in terms of gauge-invariant binding energy vs. orbital angular momentum curves. By comparing to a binary black hole configuration we can estimate the different tidal and spin contributions to the binding energy for the first time. Additionally, a frequency shift in the main emission mode of the hyper massive neutron star is observed. Our results suggest that a detailed modeling of merger waveforms requires the inclusion of spin, even for the moderate magnitudes observed in binary neutron star systems.