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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Gravitationswellen I

GR 2.2: Vortrag

Montag, 25. Februar 2013, 16:45–17:00, HS 6

Equation-of-state dependence of gravitational waves, nucleosynthesis and optical transients from neutron-star mergers — •Andreas Bauswein and Hans-Thomas Janka — Max-Planck-Institut fuer Astrophysik, Garching, Germany

Based on a representative set of relativistic hydrodynamical simulations we discuss the influence of the high-density equation of state on observable features of neutron-star mergers. The dependence of the gravitational-wave emission on the equation of state of neutron-star matter is addressed. On the basis of our survey we point out a novel possibility to determine neutron-star radii from gravitational-wave detections from the postmerger phase of a neutron-star coalescence. The likelihood of an corresponding gravitational-wave observation is estimated. Moreover, nucleosynthesis calculations are presented revealing a robust rapid neutron-capture process in the ejecta of neutron-star collisions. The properties of optical transients which are powered by the radioactive decay of the freshly synthesized elements, are discussed as well.