hypernova

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hypernova

(hÿ-per-noh -vă) A new type of supernova, possibly related to cosmological gamma-ray bursts. The prototype supernova, SN 1998bw, was an unusually energetic event, some 30 times more luminous than a normal core-collapse supernova. It was also detected as a gamma-ray burst, albeit a weak one. In the best model to date, the progenitor was a rapidly rotating, massive helium star that collapsed into a black hole forming a massive disk around it. Matter ejected along the spin axis in the form of a relativistic jet is believed to be responsible for the gamma-ray burst. Several more hypernovae have been identified since 1998.
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Until the 1990s, hypernovas were classified as such only if they had the energy of 100 supernovas.
In particular, a phenomenon known as a white dwarf hypernova could have sucked alien life into a black hole.
It is the most extreme object ever found in the Universe and they have christened it a 'Hypernova'.
Because supernovas are far more common residents of the celestial zoo than are hypernovas, this suggests gamma-ray bursts may erupt relatively frequently.
Theorists recently invoked such an explosion, dubbed a hypernova, to explain the enormous energy unleashed by a gamma-ray burst recorded in December 1997 (SN: 5/9/98, p.
According to a leading theory, a hypernova jet generates gamma-ray bursts when particles within it collide (SN: 7/10/99, p.