Statements (24)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:star
|
| gptkbp:bfsLayer |
4
|
| gptkbp:bfsParent |
gptkb:RR_Lyrae_Stars
|
| gptkbp:are |
often studied in astrophysics
found in globular clusters metal-poor stars important for measuring cosmic distances pulsating stars associated with the instability strip in the Hertzsprung-Russell diagram a type of variable star older than Type I Cepheids typically found in older stellar populations used in distance measurement used to determine the scale of the universe used in the calibration of the cosmic distance ladder |
| gptkbp:class |
into different subtypes
|
| gptkbp:exhibits |
period-luminosity relationship
|
| gptkbp:first_introduced |
in the 1950s
|
| gptkbp:have |
a characteristic light curve
a range of pulsation periods lower luminosity than Type I Cepheids |
| https://www.w3.org/2000/01/rdf-schema#label |
Type II Cepheid variables
|
| gptkbp:is_found_in |
in the Milky Way and other galaxies
|
| gptkbp:lighting |
over a period of days to weeks
|