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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Population III stars profoundly altered the universe when they exploded as hypernovae (hypernovae is a generic term for stellar explosions that are considerably more powerful than supernovae).
But the first hypernovae dispersed all their heavy elements into the surrounding gas.
5-meter mirror, JWST should find hundreds of Pop III hypernovae per square degree surveyed in one year.
A popular theoretical model to explain hypernovae and GRBs; a very massive, rapidly rotating star whose core collapses into a black hole at the end of its life.
Many now suspect that hypernovae and gamma-ray bursts are one and the same.
Hypernovae seem to be rare, judging by the paucity of their possible remnants.
The case for hypernovae suddenly seemed to become much stronger on April 25th, when a 40-second gamma-ray burst was pinned down with arcminute accuracy near the barred spiral galaxy ESO 184-G82.