RR Lyrae variable stars
E492359
RR Lyrae variable stars are old, low-mass pulsating stars used as standard candles to measure distances within the Milky Way and nearby galaxies.
All labels observed (2)
| Label | Occurrences |
|---|---|
| RR Lyrae variables | 2 |
| RR Lyrae variable stars canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5088989 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: RR Lyrae variable stars Context triple: [SMC, contains, RR Lyrae variable stars]
-
A.
Delta Scuti
Delta Scuti is a variable star in the constellation Scutum, serving as the prototype of the Delta Scuti class of short-period pulsating stars.
-
B.
variable star R Scuti
R Scuti is a luminous RV Tauri-type pulsating variable star in the constellation Scutum, notable for its large, irregular brightness variations and advanced evolutionary stage.
-
C.
variable star VY Scuti
Variable star VY Scuti is a highly luminous red supergiant located in the constellation Scutum and is among the largest known stars by radius.
-
D.
Cepheid
Cepheid is a molecular diagnostics company known for its rapid, automated PCR-based testing systems used in clinical and research settings.
-
E.
UY Scuti
UY Scuti is a 2021 studio album by Nigerian rapper and singer Olamide that blends Afrobeats, hip-hop, and pop influences.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: RR Lyrae variable stars Target entity description: RR Lyrae variable stars are old, low-mass pulsating stars used as standard candles to measure distances within the Milky Way and nearby galaxies.
-
A.
Delta Scuti
Delta Scuti is a variable star in the constellation Scutum, serving as the prototype of the Delta Scuti class of short-period pulsating stars.
-
B.
variable star R Scuti
R Scuti is a luminous RV Tauri-type pulsating variable star in the constellation Scutum, notable for its large, irregular brightness variations and advanced evolutionary stage.
-
C.
variable star VY Scuti
Variable star VY Scuti is a highly luminous red supergiant located in the constellation Scutum and is among the largest known stars by radius.
-
D.
Cepheid
Cepheid is a molecular diagnostics company known for its rapid, automated PCR-based testing systems used in clinical and research settings.
-
E.
UY Scuti
UY Scuti is a 2021 studio album by Nigerian rapper and singer Olamide that blends Afrobeats, hip-hop, and pop influences.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Population II star
ⓘ
horizontal branch star ⓘ pulsating variable star ⓘ standard candle ⓘ |
| calibratedBy |
Gaia mission data
ⓘ
parallax measurements ⓘ |
| discovered | early 20th century ⓘ |
| distanceScaleUse |
Local Group distance scale
ⓘ
Milky Way distance scale ⓘ |
| evolutionaryStage | core helium-burning phase ⓘ |
| foundIn |
Milky Way
NERFINISHED
ⓘ
galactic halo ⓘ globular cluster ⓘ nearby galaxy ⓘ |
| hostGalaxyComponent |
dwarf spheroidal galaxy
ⓘ
thick disk ⓘ |
| lightCurveShapeRRab | asymmetric sawtooth ⓘ |
| lightCurveShapeRRc | more sinusoidal ⓘ |
| locatedIn | instability strip ⓘ |
| metallicity | metal-poor ⓘ |
| namedAfter | RR Lyrae NERFINISHED ⓘ |
| observationalBand |
infrared
ⓘ
optical ⓘ |
| periodLuminosityRelation |
present but weaker in optical bands
ⓘ
tight in infrared bands ⓘ |
| RRabCharacteristics | fundamental-mode pulsators ⓘ |
| RRcCharacteristics | first-overtone pulsators ⓘ |
| RRdCharacteristics | double-mode pulsators ⓘ |
| spectralTypeRange | A to F ⓘ |
| subclass |
RRab
ⓘ
RRc ⓘ RRd ⓘ |
| tracesComponent |
old bulge population
ⓘ
stellar halo ⓘ |
| typicalAbsoluteMagnitudeV | around +0.6 ⓘ |
| typicalAge | old ⓘ |
| typicalAmplitudeRangeV | 0.3 to 2 magnitudes ⓘ |
| typicalEffectiveTemperatureRange | about 6000 to 7500 K ⓘ |
| typicalLocationInCluster | horizontal branch of color-magnitude diagram ⓘ |
| typicalLuminosity | about 40 to 50 times solar luminosity ⓘ |
| typicalMass | about 0.6 to 0.8 solar masses ⓘ |
| typicalMetallicityRange | [Fe/H] from about −2.5 to −0.5 ⓘ |
| typicalPeriodRange | 0.2 to 1 day ⓘ |
| typicalPopulation | Population II ⓘ |
| usedFor |
Galactic structure studies
ⓘ
distance measurement ⓘ tracing old stellar populations ⓘ |
| variabilityCause | radial pulsation ⓘ |
| variabilityMechanism | kappa mechanism ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: RR Lyrae variable stars Description of subject: RR Lyrae variable stars are old, low-mass pulsating stars used as standard candles to measure distances within the Milky Way and nearby galaxies.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
RR Lyrae variables
this entity surface form:
RR Lyrae variables