Heidelberg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
GR: Fachverband Gravitation und Relativitätstheorie
GR 9: Gravitational Waves
GR 9.6: Vortrag
Mittwoch, 23. März 2022, 17:55–18:15, GR-H2
Quantifying modelling uncertainties when combining multiple gravitational-wave detections from binary neutron star sources — •Nina Kunert1, Peter Tsun Ho Pang2,3, Ingo Tews4, Michael William Coughlin5, and Tim Dietrich1,6 — 1Institute for Physics and Astronomy, University of Potsdam, D-14476 Potsdam, Germany — 2Nikhef, Science Park 105, 1098 XG Amsterdam, The Netherlands — 3Institute for Gravitational and Subatomic Physics (GRASP), Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands — 4Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA — 5School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA — 6Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Muehlenberg 1, Potsdam 14476, Germany
The combined analysis of multiple gravitational-wave signals from binary neutron star sources enables to constrain the neutron-star radius with unprecedented accuracy in the near future. However, it is crucial to ensure that uncertainties inherent in the gravitational-wave models will not lead to systematic biases when multiple detections are combined. To quantify waveform systematics, we perform an extensive simulation campaign of binary neutron-star sources and analyse them with a set of four different waveform models. We find that statistical uncertainties in the neutron-star radius decrease to ± 250m (2% at 90% credible interval), while systematic differences among currently employed waveform models can be twice as large emphasizing the need for waveform models with increased accuracy.