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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Numerische Relativitätstheorie II

GR 10.2: Talk

Wednesday, February 27, 2013, 16:45–17:00, HS 6

Highly eccentric neutron star binaries as revealed by numerical relativity: Properties of their gravitational waves and merger remnants — •Nathan Johnson-McDaniel, Sebastiano Bernuzzi, Marcus Thierfelder, and Bernd Brügmann — Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität, Jena, Deutschland

We describe the results of our numerical evolutions of highly eccentric neutron star binaries, focusing on the properties of their gravitational wave signal, accretion disk, and ejecta. On the gravitational wave side, we consider the repeated burst structure from the stars' close encounters and the signal from tidally induced oscillations of the neutron stars, and assess prospects for detection. On the matter side, we consider how the properties of the (in some cases fairly massive) accretion disk and ejecta from the merger relate to potential electromagnetic signals (e.g., short gamma-ray bursts or radio afterglow) and r-process nucleosynthesis. We also discuss how all these properties depend upon the binary's initial conditions and the masses and equation of state of the neutron stars. Finally, we describe our efforts to ensure the accuracy of our simulations.