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.
We believe we can operate our Albert supermarkets anywhere in Poland and the Hypernova hypermarkets in large, but not necessarily the largest towns.
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.