Uncovering the quark-gluon plasma
We show the merger of two neutron stars of 1.3 solar masses. They might form a black hole after some time, but not in the 40ms we managed to simulate (this cost about 5 days using 96 CPUs on the Cartesius supercomputer..). The gravitational wave signal of the final state is characteristic for the poorly understood equation of state of neutron star matter and hence very interesting to observe in i.e. the LIGO/VIRGO gravitational wave detector.
We show the merger of two neutron stars of 1.4 solar masses. They first settle to a hyper-massive neutron star, which after about 10ms collapses to black hole. This 10ms gives a very characteristic gravitational wave signal and hence is extremely interesting to observe to learn more about the nature of neutron stars.
We show the merger of two neutron stars of 1.5 solar masses. They quickly form a black hole, which is perhaps a bit unfortunate, since this means the gravitational wave spectrum (as can be observed by the LIGO observatory) is rather featureless.