|
gptkbp:instanceOf
|
variable star
|
|
gptkbp:alsoKnownAs
|
gptkb:Classical_Cepheids
|
|
gptkbp:color
|
yellow supergiant
|
|
gptkbp:differenceFromTypeII
|
higher luminosity
higher mass
younger age
|
|
gptkbp:discoveredBy
|
gptkb:Henrietta_Swan_Leavitt
|
|
gptkbp:distance
|
standard candle
|
|
gptkbp:evolutionaryStage
|
post-main-sequence
|
|
gptkbp:example
|
gptkb:Delta_Cephei
Eta Aquilae
Zeta Geminorum
|
|
gptkbp:firstObserved
|
late 18th century
|
|
gptkbp:foundIn
|
gptkb:Population_I_stars
|
|
gptkbp:galacticDistribution
|
disk of the Milky Way
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Type I Cepheids
|
|
gptkbp:importantFor
|
gptkb:cosmic_distance_ladder
|
|
gptkbp:lightCurveShape
|
asymmetric
|
|
gptkbp:location
|
spiral arms of galaxies
|
|
gptkbp:luminosity
|
up to 100,000 times solar luminosity
|
|
gptkbp:mass
|
4 to 20 solar masses
|
|
gptkbp:metallicity
|
high
|
|
gptkbp:namedAfter
|
gptkb:Delta_Cephei
|
|
gptkbp:period
|
1 to 100 days
|
|
gptkbp:periodLuminosityRelation
|
yes
|
|
gptkbp:periodRange
|
1 to 100 days
|
|
gptkbp:pulsationMechanism
|
kappa mechanism
|
|
gptkbp:spectralType
|
F6-K2
|
|
gptkbp:usedFor
|
distance measurement
|
|
gptkbp:variabilityCause
|
radial pulsation
|
|
gptkbp:variableType
|
pulsating variable
|
|
gptkbp:bfsParent
|
gptkb:Classical_Cepheids
|
|
gptkbp:bfsLayer
|
7
|