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gptkbp:instance_of
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gptkb:star
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gptkbp:affects
|
galaxy distance calculations
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gptkbp:associated_with
|
young stellar populations
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gptkbp:average_temperature
|
5,000 to 6,000 K
|
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gptkbp:brightness_peak
|
occurs at maximum light
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gptkbp:can_be_found_in
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star-forming regions
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gptkbp:contributes_to
|
stellar population studies
the cosmic distance ladder
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gptkbp:discovered_by
|
gptkb:Henrietta_Swan_Leavitt
|
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gptkbp:example
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gptkb:Delta_Cephei
gptkb:Eta_Aquilae
gptkb:Zeta_Geminorum
gptkb:Beta_Doradus
|
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gptkbp:first_appearance
|
the early 20th century
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gptkbp:has
|
a well-defined period-luminosity relationship
|
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gptkbp:has_color
|
varies during pulsation
|
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gptkbp:has_luminosity
|
varies with period
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gptkbp:has_spectral_type
|
F to K
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Classical Cepheid
|
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gptkbp:is_affected_by
|
metallicity effects
|
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gptkbp:is_essential_for
|
gptkb:cosmology
understanding galaxy formation
stellar evolution studies
|
|
gptkbp:is_found_in
|
gptkb:the_Large_Magellanic_Cloud
gptkb:the_Small_Magellanic_Cloud
open clusters
spiral galaxies
|
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gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
various wavelengths
|
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gptkbp:is_used_to
|
calibrate other distance indicators.
|
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gptkbp:key
|
standard candle in astronomy
|
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gptkbp:light_variation
|
is periodic
|
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gptkbp:lighting
|
characteristic shape
up to several magnitudes
intrinsically bright
|
|
gptkbp:located_in
|
the Milky Way and other galaxies
|
|
gptkbp:mass
|
4 to 20 solar masses
|
|
gptkbp:originated_in
|
post-main sequence
|
|
gptkbp:period_range
|
1 to 100 days
|
|
gptkbp:pulsation_mechanism
|
thermal ionization
|
|
gptkbp:pulsation_period
|
is stable over time
|
|
gptkbp:related_to
|
Type I supernovae
|
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gptkbp:relationship_with
|
period-luminosity relation
|
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gptkbp:research
|
gptkb:spectroscopy
photometry
|
|
gptkbp:scientific_classification
|
a type of Cepheid variable star
|
|
gptkbp:type
|
pulsating star
|
|
gptkbp:used_in
|
distance measurement
galactic mapping
|
|
gptkbp:used_to_measure
|
Hubble constant
|
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gptkbp:bfsParent
|
gptkb:Cepheid_variable
|
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gptkbp:bfsLayer
|
6
|