München 2019 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 12: Gravitational Waves

GR 12.2: Talk

Thursday, March 21, 2019, 14:45–15:00, HS 4

Gravitational-wave luminosity of binary neutron stars mergers — •Francesco Zappa and Sebastiano Bernuzzi — Friedrich-Schiller-Universität Jena Theoretisch-Physikalisches Institut, Fröbelstieg 1, D-07743 Jena

We give Numerical Relativity estimate of the luminosity peak of Gravitational Waves emitted during the coalescence of Binary Neutron Stars. Our model is constructed from the CoRe-collaboration database and depends only on the main binary's parameters, allowing to make predictions of the luminosity of such events. Highest luminosity peaks are produced when the merger ends in a Black Hole that promptly forms after the collision of the two stars, while the largest amount of GW energy is emitted when a massive, rapidly rotating neutron star forms. This allows to make estimates on the outcome of BNS mergers based on the fundamental parameters of the binary of the binary system only. In addition we provide the upper limit for the maximum GW energy emitted in the process as predicted by NR and eventually we discuss a simple empirical relation between the total GW energy and the angular momentum of the remnant, with its implications.