|
gptkbp:instanceOf
|
stellar remnant
|
|
gptkbp:ageRange
|
up to billions of years
|
|
gptkbp:canAccreteMatter
|
from companion star
|
|
gptkbp:canBe
|
single
binary system member
|
|
gptkbp:cataloguedIn
|
gptkb:Gaia_mission
gptkb:Sloan_Digital_Sky_Survey
|
|
gptkbp:cause
|
gptkb:Type_Ia_supernova_(in_binary_systems)
|
|
gptkbp:composedOf
|
electron-degenerate matter
|
|
gptkbp:coolingProcess
|
radiative cooling
|
|
gptkbp:coreComposition
|
gptkb:helium
carbon and oxygen
oxygen and neon
|
|
gptkbp:density
|
very high
|
|
gptkbp:diameter
|
Earth-sized
|
|
gptkbp:discoveredBy
|
gptkb:Sirius_B
gptkb:Williamina_Fleming
|
|
gptkbp:distanceToNearest
|
Sirius B, 8.6 light years
|
|
gptkbp:eventualFate
|
gptkb:black_dwarf
|
|
gptkbp:evolutionaryStage
|
final stage for low- and medium-mass stars
|
|
gptkbp:example
|
gptkb:GJ_86_B
gptkb:Procyon_B
gptkb:Sirius_B
gptkb:Stein_2051_B
gptkb:van_Maanen's_Star
|
|
gptkbp:exhibits
|
gravitational redshift
nova outbursts
pulsations
|
|
gptkbp:formedBy
|
red supergiant
|
|
gptkbp:foundIn
|
gptkb:Milky_Way
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
white dwarfs
|
|
gptkbp:luminosity
|
low
|
|
gptkbp:magneticFieldStrength
|
can be strong
|
|
gptkbp:massLimit
|
gptkb:Chandrasekhar_limit
|
|
gptkbp:notUndergo
|
nuclear fusion
|
|
gptkbp:numberInMilkyWay
|
estimated 10 billion
|
|
gptkbp:observedBy
|
space telescopes
optical telescopes
ultraviolet telescopes
|
|
gptkbp:rotationPeriod
|
seconds to days
|
|
gptkbp:spectralType
|
DA, DB, DC, DO, DZ, DQ
|
|
gptkbp:studiedBy
|
astrophysicists
cosmic chronometry
|
|
gptkbp:surfaceGravity
|
very high
|
|
gptkbp:surfaceLayer
|
gptkb:helium
hydrogen
|
|
gptkbp:surfaceTemperatureRange
|
5,000 K to 100,000 K
|
|
gptkbp:temperature
|
high
|
|
gptkbp:typicalMass
|
0.6 solar masses
|
|
gptkbp:usedToEstimate
|
age of the Milky Way
|
|
gptkbp:bfsParent
|
gptkb:Fermi_gas
|
|
gptkbp:bfsLayer
|
4
|