Aug 2 – 6, 2021
Europe/Brussels timezone

Thermal Effects in Binary Neutron Star Merger Simulations

Aug 3, 2021, 9:20 AM


Parallel contribution F: Nuclear and Astroparticle Physics Parallels Track F


Mr Peter Hammond (University of Southampton)


Binary Neutron Star (BNS) mergers provide a rich laboratory for the study of matter at extreme densities and temperatures. In this talk we present the results of state-of-the-art BNS simulations using modern 3-parameter (density, temperature, electron fraction) equations of state (EoSs), with particular focus on behaviour due to temperature and composition dependant effects.

First, we go over the ingredients for a BNS simulation, and how our simulations differ from the norm. We then discuss the conditions experienced by matter in such a merger event, and the implications this has for the generation of EoSs. Finally, we cover some of the physics we are attempting to study with these simulations, in particular bulk viscosity, and the difficulties in including such phenomena in simulations, such as the "true" definition of beta-equilibrium, and the need for reactions and neutrinos.

Primary author

Mr Peter Hammond (University of Southampton)


Mr Nils Andersson (University of Southampton) Mr Ian Hawke (University of Southampton)

Presentation materials