|
gptkbp:instanceOf
|
gptkb:star
astronomer
hypothetical star
|
|
gptkbp:age
|
can be millions of years
|
|
gptkbp:alternativeName
|
gptkb:TŻO
collapsed star
degenerate star
Thorne–Żytkow_object
Wolf-Rayet_star
Wolf–Rayet_star
brown_dwarf
dwarf_nova
neutron_star
red_dwarf
|
|
gptkbp:associatedWith
|
gptkb:gamma-ray_bursts
nebulae
star-forming regions
stellar wind bubbles
|
|
gptkbp:canBe
|
gptkb:magnetar
white dwarf
supernova
pulsar
black hole
binary star system
runaway star
|
|
gptkbp:canBeBinary
|
false
true
|
|
gptkbp:canMergeToForm
|
supernova
black hole
|
|
gptkbp:cataloguedIn
|
gptkb:SIMBAD
gptkb:Wolf-Rayet_Catalogue
Wolf–Rayet catalogue
|
|
gptkbp:characteristic
|
broad emission lines
depleted hydrogen
helium-rich atmosphere
high mass loss rate
strong stellar winds
|
|
gptkbp:compatibleWith
|
white dwarf
stellar classification
black hole
|
|
gptkbp:composedOf
|
gptkb:neutrons
|
|
gptkbp:density
|
extremely high
|
|
gptkbp:describedBy
|
star with a neutron star core inside a red supergiant envelope
|
|
gptkbp:discoveredBy
|
gptkb:Walter_Baade
gptkb:Fritz_Zwicky
gptkb:Charles_Wolf
gptkb:Georges_Rayet
|
|
gptkbp:discoveredIn
|
1867
1934
|
|
gptkbp:emits
|
gptkb:X-rays
gptkb:gamma_rays
gptkb:radio_waves
radiation therapy
visible light
|
|
gptkbp:evolutionaryStage
|
late stage massive star
|
|
gptkbp:firstCataloguedBy
|
1867
|
|
gptkbp:firstObserved
|
gptkb:Paris_Observatory
1867
|
|
gptkbp:form
|
evolved from O-type star
|
|
gptkbp:frequency
|
rare
|
|
gptkbp:hasCompanion
|
can be in binary system
|
|
gptkbp:hasCoreCity
|
superfluid neutrons
|
|
gptkbp:hasCrust
|
gptkb:stone
|
|
gptkbp:hasEmissionLine
|
gptkb:He_II
gptkb:N_III
gptkb:C_III
gptkb:O_VI
|
|
gptkbp:hasEquationOfState
|
unknown
|
|
gptkbp:hasEscapeVelocity
|
about 0.4c
|
|
gptkbp:hasGravitationalField
|
extremely strong
|
|
gptkbp:hasGravitationalRedshift
|
significant
|
|
gptkbp:hasGravitationalWaves
|
from mergers
|
|
gptkbp:hasNameExample
|
gptkb:Crab_Pulsar
gptkb:PSR_B1919+21
gptkb:PSR_J0348+0432
gptkb:Vela_Pulsar
|
|
gptkbp:hasRadius
|
about 10 kilometers
|
|
gptkbp:hasSpinDown
|
due to magnetic braking
|
|
gptkbp:hasUnusualElementAbundances
|
yes
|
|
gptkbp:heliumContent
|
high
|
|
gptkbp:hydrogenContent
|
low
|
|
gptkbp:lifespan
|
short
few hundred thousand years
|
|
gptkbp:locatedIn
|
universe
galaxies
|
|
gptkbp:location
|
gptkb:Milky_Way
other galaxies
|
|
gptkbp:luminosity
|
varies
up to several million times Sun
|
|
gptkbp:magneticFieldStrength
|
very strong
|
|
gptkbp:mass
|
1.1 to 2.3 solar masses
10–25 solar masses
|
|
gptkbp:metallicity
|
high
|
|
gptkbp:namedAfter
|
gptkb:Kip_Thorne
gptkb:Anna_Żytkow
gptkb:Charles_Wolf
gptkb:Georges_Rayet
|
|
gptkbp:namedFor
|
gptkb:Wolf–Rayet
|
|
gptkbp:notableExample
|
gptkb:HD_56925
gptkb:Gamma_Velorum
gptkb:WR_104
gptkb:WR_124
gptkb:WR_136
|
|
gptkbp:observedBy
|
gptkb:X-ray_telescopes
gptkb:gamma-ray_telescopes
radio telescopes
|
|
gptkbp:originatedIn
|
gptkb:core-collapse_supernova
|
|
gptkbp:possibleCandidate
|
gptkb:HV_2112
|
|
gptkbp:predictedToBeRare
|
yes
|
|
gptkbp:proposedBy
|
gptkb:Kip_Thorne
gptkb:Anna_Żytkow
1977
|
|
gptkbp:range
|
10–25 solar masses
|
|
gptkbp:relatedTo
|
gptkb:Luminous_blue_variable
stellar classification
supernova progenitor
|
|
gptkbp:remnants
|
supernova
|
|
gptkbp:rotationPeriod
|
milliseconds to seconds
|
|
gptkbp:shape
|
nearly spherical
|
|
gptkbp:spectralType
|
gptkb:WO
WC
WN
|
|
gptkbp:studiedIn
|
astrophysics
stellar evolution
|
|
gptkbp:subclassOf
|
massive star
|
|
gptkbp:surface
|
gptkb:helium
carbon
nitrogen
oxygen
thin atmosphere
|
|
gptkbp:surfaceGravity
|
very strong
|
|
gptkbp:temperature
|
about 600,000 K
30,000–200,000 K
|
|
gptkbp:theorizedToFormBy
|
merger of a neutron star and a red supergiant
|
|
gptkbp:bfsParent
|
gptkb:Tolman–Oppenheimer–Volkoff_limit
|
|
gptkbp:bfsLayer
|
4
|