In this Working Area, ELEMENTS studies the dynamics of binary neutron-star (BNS) merger events using the most advanced numerical simulations in general relativity to obtain accurate predictions of the expected GW signal and on its EM counterpart (Arcones, Bauswein, Martínez-Pinedo, Rezzolla).
Significant progress will be achieved in determining the impact of general-relativistic (GR) magnetohydrodynamic (MHD) turbulences, MHD instabilities, and magnetic-field amplification on the remnant produced by merging NSs. We investigate the impact of phase transitions on the dynamics of BNS mergers (Bauswein, Rezzolla) and their GW signal, extending and improving the very successful work done so far. In addition, we also use BNS mergers as a powerful tool to explore violations of theory of General Relativity and find signatures of alternative theories of gravity (Sagunski).
ELEMENTS develops novel formulations in relativistic dissipative hydrodynamics and MHD and applies them to both HICs and BNS mergers (Elfner, Rezzolla, Rischke). Furthermore, it extends fluctuation measurements by including the reconstruction of light nuclei and the detection of neutrons by combining detection capabilities of HADES and R3B with pilot experiments performed within the FAIR Phase-0 infrastructure (Aumann, Galatyuk, Obertelli, Stroth).