For The First Time Ever, Astronomers Have Witnessed The Birth of a Neutron Star Binary

When the violent death of a massive star concluded with a whimper instead of a bang, astronomers weren’t sure what to make of it. Now it turns out that oddly anaemic death indicates a never-before-seen cosmic phenomenon – the birth of a binary neutron star system, two dead stellar remnants locked in a death spiral.

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Tau.Neutrino said:

For The First Time Ever, Astronomers Have Witnessed The Birth of a Neutron Star Binary

When the violent death of a massive star concluded with a whimper instead of a bang, astronomers weren’t sure what to make of it. Now it turns out that oddly anaemic death indicates a never-before-seen cosmic phenomenon – the birth of a binary neutron star system, two dead stellar remnants locked in a death spiral.

more…

> No, not Narnia. The team inferred, based on the strength and mass of the supernova, that the star had a previously unnoticed but very dense binary buddy, such as a white dwarf, black hole, or another neutron star, that stripped off most of its material before the supernova.

So, not necessarily a neutron star binary.