type Ib supernova

type Ib supernova

[¦tīp ‚wən′bē ¦sü·pər¦nō·və]
(astronomy)
A member of a subclass of the type I supernovae that lack a strong line feature at 615.0 nanometers due to ionized silicon; are approximately a factor of 4 fainter than type Ia and have light curves that are a little broader and slower to decline; have, in addition to iron emission, broad lines of oxygen and calcium in their late-time spectra; and are believed to be explosions of massive stars that are devoid of hydrogen.
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References in periodicals archive ?
SN 2013ek is a Type Ib supernova, which is caused by the core collapse of massive stars that have shed - or lost - their outer layers of hydrogen.
The explosive collapse of a Wolf-Rayet star appears as a Type Ib supernova - one that lacks any spectral evidence for hydrogen.
Pinpointing a progenitor star at exactly the same location as a Type Ib supernova was the best way to test the theories about the genesis of this type of explosion," Kasliwal said.
A massive star stripped of nearly all its hydrogen envelope is reminiscent of the progenitor of a Type Ib supernova.