Merging neutron stars: asymmetric systems

TL;DR

This paper presents 3D Newtonian hydrodynamic simulations of the final inspiral and merger of slightly asymmetric neutron star binaries, exploring implications for nucleosynthesis and gamma-ray bursts.

Contribution

It introduces detailed simulations of asymmetric neutron star mergers, focusing on spin and mass differences, which were less studied before.

Findings

Asymmetric systems show distinct merger dynamics.

Results suggest implications for nucleosynthesis processes.

Potential links to gamma-ray burst mechanisms.

Abstract

Results of 3D, Newtonian hydrodynamic calculations of the last stages of the inspiral and the final coalescence of neutron star binary systems are described. The focus is on sligthly asymmetric systems with the asymmetry stemming either from different spins or different masses of the binary components. Implications for nucleosynthesis and gamma ray bursts are discussed. Test calculations for the used viscosity scheme are provided in the appendix.