type II supernova

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type II supernova

[′tīp ¦tü ¦sü·pər′nō·və]
(astronomy)
A member of a class of supernovae that display prominent lines of hydrogen in their spectra and have irregular light curves; they are believed be explosions of young massive stars, still in possession of their hydrogenic surface layers.
References in periodicals archive ?
To address this conundrum, researchers including Caltech astrophysicist Brian Grefenstette pointed NASA's Nuclear Spectroscopic Telescope Array at Cassiopeia A (below), the remnant of a nearby core-collapse supernova whose light first reached Earth about 350 years ago.
These two grains are thought to have come instead from a core-collapse supernova, a massive star that exploded at the end of its life.
Scientists initially suspected that RCW 86 was the result of a core-collapse supernova, the most powerful type of stellar blast.
But other evidence argued against a core-collapse supernova.
Washington, March 27 ( ANI ): Supernovae were always thought to occur in two main "flavors" - a core-collapse supernova that is the explosion of a star about 10 to 100 times as massive as our Sun and a Type Ia supernova, which is the complete disruption of a tiny white dwarf.
Other features of the remnant, however, especially its dense shell of gas and dust, indicate that it came from a core-collapse supernova.
Only at that point does it develop a large iron core and ultimately explodes as a core-collapse supernova.
Several features indicate that 1987A is a core-collapse supernova, in which gravity crunches a massive star's core down to a sphere only 20 kilometers in diameter.
If that rate of dust expulsion is typical, it would suggest that core-collapse supernovas have been major producers of dust throughout cosmic history.
A small fraction of core-collapse supernovas produce gamma-ray bursts (SN: 5/17/03, p.
Isn't that because gamma-ray bursts from core-collapse supernovas are directional, along the axis of rotation?