The GW170817 event

On October 16, 2017, the LIGO Scientific Collaboration, Virgo Collaboration, and its partners announced the first observation of gravitational-waves from a pair of inspiraling neutron stars that occured on August 17, 2017. [Short movie describing the detail of the obeservations.]


Here you can find the companion movies of our simulation of a Binary Neutron Stars merger compatible with the measured properties of the GW170817 event that was detected by the LIGO and Virgo interferometers. After the merger, this system collapse to BH using the SLy EOS. The simulations were performed on the CINECA Galileo system (Italy). The 3D visualization by F. Loeffler.

The GW170817 events (2d animations)


  

Background material

The investigation has been done using only publicly available open source software, in particular, the Einstein Toolkit code deployed for the dynamical evolution and the LORENE code for the generation of the initial models. All of the source code and parameters used for the simulations have been made publicly available. This not only makes possible to re-run and re-analyze our data; it also enables others to directly build upon this work for future research.

The modified code as well as the post processing (Python) scripts can be download from the SVN server:
svn --username=anonymous checkout https://einstein.pr.infn.it/svn/numrel/pub/ #(passwd: anon)

We kindly ask to cite ( Phys. Rev. D 93, 064047, arXiv:1509.08804)

Instructions

In order to checkout the source code necessary to re-run our simulations, use the GetComponents script:

  ./GetComponents https://einstein.pr.infn.it/gravity/Research/BNS2015.th
  

Compiling the Einstein Toolkit is outside of the scope of this document, but the following tutorial might help: Einstein Toolkit New Users Tutorial.