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gptkbp:instanceOf
|
stellar remnant
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gptkbp:age
|
can be billions of years old
|
|
gptkbp:canBe
|
carbon-oxygen white dwarf
helium white dwarf
oxygen-neon-magnesium white dwarf
|
|
gptkbp:cause
|
gptkb:Type_Ia_supernova_(in_binary_systems)
|
|
gptkbp:color
|
white or blue-white
|
|
gptkbp:composedOf
|
electron-degenerate matter
|
|
gptkbp:coolOverTime
|
true
|
|
gptkbp:density
|
very high
|
|
gptkbp:diameter
|
comparable to Earth
|
|
gptkbp:discoveredBy
|
gptkb:Sirius_B
William Herschel (term later coined by Willem Luyten)
|
|
gptkbp:distanceFromEarth
|
nearest is Sirius B (8.6 light years)
|
|
gptkbp:doNot
|
undergo fusion
|
|
gptkbp:eventualFate
|
black dwarf (theoretical)
|
|
gptkbp:evolutionaryStage
|
final stage for low- and medium-mass stars
|
|
gptkbp:formedBy
|
red giant stars
|
|
gptkbp:foundIn
|
binary star systems
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
white dwarf stars
|
|
gptkbp:luminosity
|
low
|
|
gptkbp:magneticFieldStrength
|
can be strong
|
|
gptkbp:mass
|
less than 1.4 solar masses
|
|
gptkbp:notableExample
|
gptkb:40_Eridani_B
gptkb:Procyon_B
gptkb:Sirius_B
|
|
gptkbp:rotationPeriod
|
can rotate rapidly
|
|
gptkbp:spectralType
|
D
|
|
gptkbp:supportedBy
|
electron degeneracy pressure
|
|
gptkbp:surfaceGravity
|
very high
|
|
gptkbp:temperature
|
initially very hot
|
|
gptkbp:bfsParent
|
gptkb:Fermi-Dirac_statistics
|
|
gptkbp:bfsLayer
|
4
|