Armed with state-of-the-art supercomputer models, scientists have shown that colliding neutron stars can produce the energetic jet required for a gamma-ray burst. Earlier simulations demonstrated that mergers could make black holes. Others had shown that the high-speed particle jets needed to make a gamma-ray burst would continue if placed in the swirling wreckage of a recent merger.
Now, the simulations reveal the middle step of the process--how the merging stars' magnetic field organizes itself into outwardly directed components capable of forming a jet. The Damiana supercomputer at Germany's Max Planck Institute for Gravitational Physics needed six weeks to reveal the details of a process that unfolds in just 35 thousandths of a second--less than the blink of an eye.
When two neutron stars or black-holes come closer and closer, their angular velocity increases with decrease of distance and they start to revolve around a constant center with high relativistic speeds due to the influence of gravity... At last,
- Neutron-stars collide to produce a giant explosion...
- Black-holes collide to form super-massive black-holes...
- (Even two neutron stars merge to form black-holes, based on the answer)
The Above is the animation of neutron star collusion by NASA
Neutron star collision: The Swift spacecraft's gamma-ray burst observation fits the theory of a collision between some combination of black holes or neutron stars. Neutron stars are dense spheres about 20 miles across. Black holes have no surface and are regions in space of infinite density. Theory predicts that these kinds of collisions would not produce a long afterglow because there isn't much "fuel" -- dust and gas -- from the objects and in the region to sustain an afterglow.
