|
gptkbp:instanceOf
|
supernova
|
|
gptkbp:associatedWith
|
star-forming regions
|
|
gptkbp:causedBy
|
collapse of massive star core
|
|
gptkbp:characterizedBy
|
hydrogen lines in spectrum
|
|
gptkbp:commonIn
|
spiral galaxies
|
|
gptkbp:contributedTo
|
interstellar medium enrichment
|
|
gptkbp:detonationMechanism
|
core collapse
|
|
gptkbp:distinctFrom
|
gptkb:Type_I_supernovae
presence of hydrogen in spectrum
|
|
gptkbp:durationOfBrightness
|
weeks to months
|
|
gptkbp:energyReleased
|
~10^44 joules
|
|
gptkbp:firstDescribed
|
gptkb:Fritz_Zwicky
1941
|
|
gptkbp:historicallyObserved
|
gptkb:SN_1054
gptkb:SN_1604
gptkb:SN_1572
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Type II supernovae
|
|
gptkbp:importantFor
|
chemical enrichment of galaxies
triggering star formation
|
|
gptkbp:lightCurveType
|
linear (Type II-L)
plateau (Type II-P)
|
|
gptkbp:notableExample
|
gptkb:SN_1993J
gptkb:SN_2004dj
gptkb:SN_1987A
|
|
gptkbp:nucleosynthesis
|
heavy elements
|
|
gptkbp:observableWavelengths
|
gptkb:radio_station
gptkb:X-rays
infrared
optical
|
|
gptkbp:observedBy
|
gptkb:Milky_Way
other galaxies
astronomers worldwide
|
|
gptkbp:peakAbsoluteMagnitude
|
-17 to -18
|
|
gptkbp:progenitorStarType
|
red supergiant
|
|
gptkbp:rareIn
|
elliptical galaxies
|
|
gptkbp:rateInMilkyWay
|
~1 per 50 years
|
|
gptkbp:remainsType
|
white dwarf
black hole
|
|
gptkbp:spectralType
|
strong hydrogen Balmer lines
|
|
gptkbp:subclassOf
|
gptkb:core-collapse_supernova
|
|
gptkbp:subspecies
|
gptkb:Type_II-L_supernova
gptkb:Type_II-P_supernova
gptkb:Type_IIb_supernova
gptkb:Type_IIn_supernova
|
|
gptkbp:typicalProgenitorMass
|
>8 solar masses
|
|
gptkbp:usedFor
|
measuring cosmic distances
studying stellar evolution
|
|
gptkbp:bfsParent
|
gptkb:Type_II_Supernovae,_Expanding_Photospheres,_and_the_Extragalactic_Distance_Scale
|
|
gptkbp:bfsLayer
|
7
|