|
gptkbp:instanceOf
|
supernova
|
|
gptkbp:class
|
Type I supernova
thermonuclear supernova
|
|
gptkbp:cosmologicalDiscovery
|
1998
|
|
gptkbp:cosmologicalImportance
|
evidence for dark energy
discovery of accelerating universe
|
|
gptkbp:detonationMechanism
|
accretion from companion star
merger of two white dwarfs
|
|
gptkbp:discoveredBy
|
gptkb:Walter_Baade
gptkb:Fritz_Zwicky
|
|
gptkbp:distance
|
up to billions of light-years
|
|
gptkbp:duration
|
weeks to months
|
|
gptkbp:elementProduced
|
gptkb:nickel-56
iron
silicon
|
|
gptkbp:explosionEnergy
|
about 1-2 x 10^44 joules
|
|
gptkbp:explosionType
|
thermonuclear
|
|
gptkbp:firstObserved
|
1930s
|
|
gptkbp:hostedBy
|
gptkb:galaxy
|
|
gptkbp:hostEnvironment
|
old stellar populations
young stellar populations
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Type Ia supernovae
|
|
gptkbp:lightCurve
|
well-defined
|
|
gptkbp:lightCurveShape
|
declines steadily after peak
|
|
gptkbp:mainDifferenceFromTypeIb/Ic
|
presence of strong silicon line
|
|
gptkbp:mainDifferenceFromTypeII
|
lack of hydrogen in spectrum
|
|
gptkbp:namedAfter
|
classification system by Rudolph Minkowski
|
|
gptkbp:notableExample
|
gptkb:SN_1006
gptkb:SN_1572
gptkb:SN_2011fe
|
|
gptkbp:observedBy
|
gptkb:Hubble_Space_Telescope
ground-based telescopes
|
|
gptkbp:peakAbsoluteMagnitude
|
about -19.3
|
|
gptkbp:powerSource
|
carbon-oxygen fusion
|
|
gptkbp:progenitor
|
white dwarf
|
|
gptkbp:rateInMilkyWay
|
about 1 every 200-500 years
|
|
gptkbp:remnants
|
supernova
|
|
gptkbp:spectralType
|
lack of hydrogen lines
strong silicon absorption line
|
|
gptkbp:subspecies
|
Type I supernova
extragalactic transient event
|
|
gptkbp:usedFor
|
measuring cosmic distances
standard candle
studying expansion of the universe
|
|
gptkbp:usedIn
|
gptkb:High-Z_Supernova_Search_Team
gptkb:Hubble_diagram
gptkb:cosmic_distance_ladder
supernova cosmology project
|
|
gptkbp:bfsParent
|
gptkb:Adam_G._Riess
gptkb:Supernova_Cosmology_Project
gptkb:Hubble_constant
gptkb:Fornax_A
|
|
gptkbp:bfsLayer
|
5
|