Sentences with phrase «thought gamma ray bursts»
Previously, scientists thought gamma ray bursts only formed from spiraling matter falling into black holes.
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Most gamma - ray burst researchers thought that the jets were dominated by either matter or the magnetic field, but not both.
Dr Sarri explains: «We thought that the best way to work out how gamma ray bursts are produced would be to mimic them in small - scale reproductions in the laboratory — reproducing a little source of these beams and look at how they evolve when left on their own.
This image shows the most common type of gamma - ray burst, thought to occur when a massive star collapses, forms a black hole, and blasts particle jets outward at nearly the speed of light.
Most astrophysicists think that gamma ray bursts, fantastically energetic flares from deep space, stream from new black holes that form when the cores of massive spinning stars collapse to trigger supernovas.
He notes that the model was originally developed for active galactic nuclei — outbursts powered by supermassive black holes — so there is no reason to think it must also apply to gamma - ray bursts.
A gamma ray burst is thought to emerge when jets of hot matter moving at near — light - speed shoot out along the rotational axis of the newborn black hole, beaming radiation into space like a lighthouse.
«People used to think supernovae and gamma - ray bursts were all the same, then we learned they come from different types of events,» Bogdanov says.
The source might be something we already know about — possibly the fierce explosions called gamma - ray bursts that are thought to mark the birth of black holes.
And gamma - ray bursts — thought to result from especially powerful supernovas or stellar collisions — are so rare that the researchers calculated that, over a billion years, there's only about a 1 in 3 billion chance of one killing off tardigrades.
Its light is three times brighter now, which may change how we think of gamma ray bursts
Stephen Thorsett of Princeton University in New Jersey has been thinking about the implications for life on Earth should a nearby object in space suddenly emit a powerful burst of gamma rays.