Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-02-15
Mon.Not.Roy.Astron.Soc.342:673,2003
Astronomy and Astrophysics
Astrophysics
39 pages, 13 figures, submitted to MNRAS; Movies can be found under http://www.astro.le.ac.uk/~sro/movies.html, higher quality
Scientific paper
10.1046/j.1365-8711.2003.06579.x
The remnant resulting from the merger of two neutron stars produces neutrinos in copious amounts. In this paper we present the neutrino emission results obtained via Newtonian, high-resolution simulations of the coalescence event. These simulations use three-dimensional smoothed particle hydrodynamics together with a nuclear, temperature dependent equation of state and a multi-flavour neutrino leakage scheme. We present the details of our scheme, discuss the neutrino emission results from a neutron star coalescence and compare them to the core-collapse supernova case where neutrino emission has been studied for several decades. The average neutrino energies are similar to those in the supernova case, but contrary to the latter, the luminosities are dominated by electron-type antineutrinos which are produced in the hot, neutron-rich, thick disk of the merger remnant. The cooler parts of this disk contain substantial fractions of heavy nuclei, which, however, do not influence the overall neutrino emission results significantly. Our total neutrino luminosities from the merger event are considerably lower than those found in previous investigations. This has serious consequences for the ability to produce a gamma-ray burst via neutrino annihilation. The neutrinos are emitted preferentially along the initial binary rotation axis, an event seen ``pole-on'' would appear much brighter in neutrinos than a similar event seen ``edge-on''.
Liebendoerfer Matthias
Rosswog Stefan
No associations
LandOfFree
High Resolution Calculations of Merging Neutron Stars II: Neutrino Emission 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 II: Neutrino Emission, 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 II: Neutrino Emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-306802