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- RR_Lyrae_variable abstract "RR Lyrae variables are periodic variable stars, commonly found in globular clusters, and often used as standard candles to measure galactic distances.This type of variable is named after the prototype, the variable star RR Lyrae in the constellation Lyra. RR Lyraes are pulsating horizontal branch stars of spectral class A (and sometimes F), with a mass of around half the Sun's. They are thought to have previously shed mass and consequently, they were once stars with similar or slightly less mass than the Sun, around 0.8 solar masses. RR Lyrae stars pulse in a manner similar to Cepheid variables, so the mechanism for the pulsation is thought to be similar, but the nature and histories of these stars is thought to be rather different.In contrast to Cepheids, RR Lyraes are old, relatively low mass, metal-poor "Population II" stars. They are much more common than Cepheids, but also much less luminous. The average absolute magnitude of an RR Lyrae is about 0.75, only 40 or 50 times brighter than our Sun. Their period is shorter, typically less than one day, sometimes ranging down to seven hours.The relationship between pulsation period and absolute magnitude of RR Lyraes makes them good standard candles for relatively near objects, especially within the Milky Way. They are extensively used in globular cluster studies, and also used to study chemical properties of older stars.".
- RR_Lyrae_variable thumbnail HR-diag-instability-strip.svg?width=300.
- RR_Lyrae_variable wikiPageExternalLink ap070415.html.
- RR_Lyrae_variable wikiPageExternalLink details.php?image_id=426.
- RR_Lyrae_variable wikiPageExternalLink RR_Lyr.html.
- RR_Lyrae_variable wikiPageExternalLink animationM15RRLYRAE25-1343.htm.
- RR_Lyrae_variable wikiPageExternalLink m3_variable_stars.html.
- RR_Lyrae_variable wikiPageExternalLink RR_Lyrae_star.html.
- RR_Lyrae_variable wikiPageID "309428".
- RR_Lyrae_variable wikiPageRevisionID "592960829".
- RR_Lyrae_variable hasPhotoCollection RR_Lyrae_variable.
- RR_Lyrae_variable subject Category:RR_Lyrae_variables.
- RR_Lyrae_variable subject Category:Standard_candles.
- RR_Lyrae_variable subject Category:Variable_stars.
- RR_Lyrae_variable type CelestialBody109239740.
- RR_Lyrae_variable type NaturalObject100019128.
- RR_Lyrae_variable type Object100002684.
- RR_Lyrae_variable type PhysicalEntity100001930.
- RR_Lyrae_variable type RRLyraeVariables.
- RR_Lyrae_variable type Star109444100.
- RR_Lyrae_variable type Thing100002452.
- RR_Lyrae_variable type Variable109468959.
- RR_Lyrae_variable type VariableStar109469152.
- RR_Lyrae_variable type VariableStars.
- RR_Lyrae_variable type Whole100003553.
- RR_Lyrae_variable comment "RR Lyrae variables are periodic variable stars, commonly found in globular clusters, and often used as standard candles to measure galactic distances.This type of variable is named after the prototype, the variable star RR Lyrae in the constellation Lyra. RR Lyraes are pulsating horizontal branch stars of spectral class A (and sometimes F), with a mass of around half the Sun's.".
- RR_Lyrae_variable label "Estrella variable RR Lyrae".
- RR_Lyrae_variable label "Gwiazdy zmienne typu RR Lyrae".
- RR_Lyrae_variable label "RR Lyrae variable".
- RR_Lyrae_variable label "RR Lyrae-ster".
- RR_Lyrae_variable label "RR-Lyrae-Stern".
- RR_Lyrae_variable label "Variabile RR Lyrae".
- RR_Lyrae_variable label "Variável RR Lyrae".
- RR_Lyrae_variable label "Étoile variable de type RR Lyrae".
- RR_Lyrae_variable label "Переменная типа RR Лиры".
- RR_Lyrae_variable label "こと座RR型変光星".
- RR_Lyrae_variable label "天琴座RR型变星".
- RR_Lyrae_variable sameAs Hvězdy_typu_RR_Lyrae.
- RR_Lyrae_variable sameAs RR-Lyrae-Stern.
- RR_Lyrae_variable sameAs Estrella_variable_RR_Lyrae.
- RR_Lyrae_variable sameAs Étoile_variable_de_type_RR_Lyrae.
- RR_Lyrae_variable sameAs Variabile_RR_Lyrae.
- RR_Lyrae_variable sameAs こと座RR型変光星.
- RR_Lyrae_variable sameAs 거문고자리_RR형_변광성.
- RR_Lyrae_variable sameAs RR_Lyrae-ster.
- RR_Lyrae_variable sameAs Gwiazdy_zmienne_typu_RR_Lyrae.
- RR_Lyrae_variable sameAs Variável_RR_Lyrae.
- RR_Lyrae_variable sameAs m.01szzp.
- RR_Lyrae_variable sameAs Q726242.
- RR_Lyrae_variable sameAs Q726242.
- RR_Lyrae_variable sameAs RR_Lyrae_variable.
- RR_Lyrae_variable wasDerivedFrom RR_Lyrae_variable?oldid=592960829.
- RR_Lyrae_variable depiction HR-diag-instability-strip.svg.
- RR_Lyrae_variable isPrimaryTopicOf RR_Lyrae_variable.
