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gptkbp:instanceOf
|
variable star
|
|
gptkbp:affiliatedWith
|
Population I star
|
|
gptkbp:alsoKnownAs
|
gptkb:Delta_Cepheid
|
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gptkbp:cataloguedIn
|
gptkb:General_Catalogue_of_Variable_Stars
|
|
gptkbp:color
|
yellow-white to yellow
|
|
gptkbp:discoveredBy
|
gptkb:Henrietta_Swan_Leavitt
|
|
gptkbp:distance
|
standard candle
|
|
gptkbp:distanceRangeMeasured
|
up to 30 million light-years
|
|
gptkbp:evolutionaryStage
|
post-main-sequence
|
|
gptkbp:example
|
gptkb:l_Carinae
gptkb:eta_Aquilae
gptkb:zeta_Geminorum
gptkb:Polaris
gptkb:Delta_Cephei
|
|
gptkbp:firstObserved
|
late 18th century
|
|
gptkbp:hasPeriodLuminosityRelation
|
true
|
|
gptkbp:hostedBy
|
gptkb:Milky_Way
gptkb:Andromeda_Galaxy
gptkb:Large_Magellanic_Cloud
gptkb:Small_Magellanic_Cloud
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Classical Cepheid
|
|
gptkbp:importantFor
|
gptkb:cosmic_distance_ladder
|
|
gptkbp:lightCurveShape
|
asymmetric
|
|
gptkbp:location
|
spiral arms of galaxies
|
|
gptkbp:luminosity
|
hundreds to thousands times solar luminosity
|
|
gptkbp:metallicity
|
high
affects period-luminosity relation
|
|
gptkbp:namedAfter
|
gptkb:Delta_Cephei
|
|
gptkbp:observedBy
|
gptkb:Gaia_spacecraft
gptkb:Hubble_Space_Telescope
|
|
gptkbp:period
|
1 to 100 days
|
|
gptkbp:periodChange
|
can occur over time
|
|
gptkbp:pulsationMechanism
|
kappa mechanism
|
|
gptkbp:pulsationMode
|
fundamental or overtone
|
|
gptkbp:range
|
4 to 20 solar masses
|
|
gptkbp:relatedTo
|
gptkb:Type_II_Cepheid
variable star
|
|
gptkbp:spectralType
|
F6 – K2
|
|
gptkbp:surfaceGravity
|
low
|
|
gptkbp:temperature
|
5000–6000 K
|
|
gptkbp:usedBy
|
gptkb:Edwin_Hubble
|
|
gptkbp:usedFor
|
distance measurement
|
|
gptkbp:usedToDiscover
|
expansion of the universe
|
|
gptkbp:variabilityAmplitude
|
up to 2 magnitudes
|
|
gptkbp:variabilityCause
|
radial pulsation
|
|
gptkbp:variableType
|
pulsating variable
|
|
gptkbp:bfsParent
|
gptkb:Cepheid
gptkb:Polaris_system
gptkb:Cepheid_variable_V340_Nor
gptkb:V862_Scorpii
gptkb:Delta_Cephei
gptkb:S_Sagittae
gptkb:S_Sagittarii
gptkb:S_Vulpeculae
|
|
gptkbp:bfsLayer
|
7
|