Statements (49)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:age |
approximately 10 billion years
|
| gptkbp:associated_with |
gptkb:Type_I_Cepheid_variables
|
| gptkbp:brightness_fluctuation |
due to pulsation
|
| gptkbp:brightness_range |
magnitude 8 to 15
|
| gptkbp:characterized_by |
regular pulsation periods
|
| gptkbp:color |
typically yellow to orange
|
| gptkbp:conducts_research_on |
extragalactic astronomy
|
| gptkbp:conducts_surveys_on |
large astronomical surveys
|
| gptkbp:contribute_to_research |
stellar population synthesis
|
| gptkbp:contribution |
galactic chemical evolution
|
| gptkbp:discovered_by |
the constellation Lyra
|
| gptkbp:distance |
up to 100,000 light-years
|
| gptkbp:first_appearance |
in the early 20th century
|
| gptkbp:found_in_clusters |
globular clusters and open clusters
|
| gptkbp:found_in_galaxies |
dwarf galaxies
|
| gptkbp:found_in_regions |
star-forming regions
|
| gptkbp:found_in_studies |
stellar classification systems
|
| gptkbp:has_luminosity |
about 100 times that of the Sun
|
| gptkbp:has_spectral_type |
A to F type stars
|
| gptkbp:has_variations |
fundamental mode and first overtone
|
| https://www.w3.org/2000/01/rdf-schema#label |
RR Lyrae stars
|
| gptkbp:important_for_cosmology |
calibrating the cosmic distance ladder
|
| gptkbp:important_for_understanding |
stellar pulsation theory
|
| gptkbp:is_essential_for |
studying the structure of the Milky Way
|
| gptkbp:is_found_in |
globular clusters
|
| gptkbp:is_observed_in |
amateur astronomers
various wavelengths |
| gptkbp:is_studied_for |
stellar dynamics
|
| gptkbp:light_variation |
due to changes in radius and temperature
|
| gptkbp:lighting |
periodic light variations
pulsates in brightness symmetric or asymmetric |
| gptkbp:mass |
0.5 to 1.0 solar masses
|
| gptkbp:metallicity |
typically low metallicity
|
| gptkbp:model |
galaxy formation models
|
| gptkbp:named_after |
gptkb:RR_Lyrae
the 19th century |
| gptkbp:observed_by_telescopes |
ground-based and space telescopes
|
| gptkbp:originated_in |
horizontal branch stars
|
| gptkbp:period |
0.2 to 1 day
|
| gptkbp:pulsation_mechanism |
thermal and ionization processes
|
| gptkbp:related_to |
stellar evolution theories
|
| gptkbp:research |
photometry
|
| gptkbp:type |
pulsating variable star
|
| gptkbp:used_for |
distance measurement in astronomy
|
| gptkbp:used_in |
stellar population studies
|
| gptkbp:bfsParent |
gptkb:Globular_Clusters
|
| gptkbp:bfsLayer |
5
|