What term technically refers to the progenitor star that collapses into a hypernova event?
Answer
Collapsar.
The term collapsar is used technically to describe the specific progenitor star that undergoes the complete gravitational collapse resulting in a hypernova. While the term hypernova refers to the explosion itself, collapsar designates the massive, rapidly spinning star whose core collapses. Although the terms are sometimes used interchangeably in historical context, the modern consensus reserves hypernova for the explosion product driven by the jet mechanism originating from the collapsar.
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Hypernova: The Bigger, Badder Supernova. - YouTube
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