High-resolution calculations of merging neutron stars - II. Neutrino emission

• DOI: 10.1046/j.1365-8711.2003.06579.x
• Publication Date: 2003-06-20T15:26:43Z
• Authors: S. Rosswog; M. Liebendörfer
• Keywords: Coalescence (physics); Annihilation

The remnant resulting from the merger of two neutron stars produces neutrinos in copious amounts. In this paper we present neutrino emission results obtained via Newtonian, high-resolution simulations coalescence event. These use three-dimensional smoothed particle hydrodynamics together with a nuclear, temperature dependent equation state and multi-flavour leakage scheme. We details our scheme, discuss star compare them to core-collapse supernova case where has been studied for several decades. average energies are similar those case, but contrary latter, luminosities dominated by electron-type antineutrinos which produced hot, neutron-rich, thick disk remnant. cooler parts contain substantial fractions heavy nuclei, which, however, do not influence overall significantly. Our total event considerably lower than found previous investigations. This serious consequences ability produce gamma-ray burst annihilation. emitted preferentially along initial binary rotation axis, an seen ``pole-on'' would appear much brighter ``edge-on''.