Cannonballs versus jets in battle of the bursters

摘要

If you were unfortunate enough to experience one of the universe's most powerful explosions up close, you would certainly be doomed. But would the blast obliterate you with jets like something from a flamethrower or with cannonball-like projectiles of plasma? We thought we knew the answer, but now the picture is not so clear.rnGamma-ray bursts (GRBs), the most violent explosions in the cosmos, are intense flashes of high-energy radiation. The shorter bursts probably happen when a neutron star collides with another neutron star or a black hole. More protracted bursts release so much energy that only one type of event is thought capable of producing them - the collapse of a massive star's core to form a black hole or neutron star.