Assertion: nebula's star | /r/CapableOf | reach core collapse
Facets:
value: at low metallicity
type: OTHER
value: by pair instability
type: CAUSE
value: with a hydrogen envelope
type: MANNER
Source sentences:
text: At low metallicity, all stars will reach core collapse with a hydrogen envelope but sufficiently massive stars collapse directly to a black hole without producing a visible supernova.
text: At very low metallicity, stars of around 140–250 M ☉ will reach core collapse by pair instability while they still have a hydrogen atmosphere and an oxygen core and the result will be a supernova with Type II characteristics but a very large mass of ejected 56Ni and high luminosity.