Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-10-08
Mon.Not.Roy.Astron.Soc.345:1077,2003
Astronomy and Astrophysics
Astrophysics
numerical viscosity measured, vertical disk structure investigated, comparison with Lattimer-Swesty EOS; MNRAS in press; movie
Scientific paper
10.1046/j.1365-2966.2003.07032.x
We present the results of 3D, high-resolution calculations of neutron star mergers. Using Newtonian gravity, but adding the forces from the emission of gravitational waves, we solve the hydrodynamics equations using the smoothed particle hydrodynamics method. The microscopic properties of the neutron star matter are described in terms of a new nuclear equation of state (EOS) based on the tables of Shen et al. (1998). The effects of neutrino emission of all flavours are accounted for. The new EOS is noticeably stiffer than the Lattimer-Swesty-EOS used in previous investigations. We find in general somewhat lower temperatures than previous investigations. This allows a substantial fraction of heavy nuclei to be present even in the inner parts of the torus that forms around the central object and yields important contributions to the neutrino opacity. The central object shows a rapid differential rotation with periods of $\sim$ 2ms, which we suspect to stabilize the central object on (at least) the simulation time scale against gravitational collapse. The differential rotation could wind up initial magnetic fields to $\sim 10^17$ G.
Davies Melvyn B.
Rosswog Stefan
No associations
LandOfFree
High Resolution Calculations of Merging Neutron Stars I: Model Description and Hydrodynamic Evolution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High Resolution Calculations of Merging Neutron Stars I: Model Description and Hydrodynamic Evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High Resolution Calculations of Merging Neutron Stars I: Model Description and Hydrodynamic Evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-551885