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... > Stellar astronomy > Stellar types > Variable stars > Intrinsic variable stars > Pulsating variable stars > RR Lyrae variable stars

Preferred term

RR Lyrae variable stars  

Definition

  • A member of a large class of pulsating stars of type A2-F6 with periods less than 1 day. They are similar to Cepheids, except that their periods are much shorter and are less luminous. RR Lyrae stars belong to Population II and are often found in globular clusters (hence one of their older names cluster variables) or elsewhere in the galactic halo. They are used as distance indicators (standard candle) out to more than 200 kpc. (en)

Broader concept

Narrower concepts

Entry terms

  • Bailey type stars (en)
  • Cluster type variable stars (en)
  • RR Lyrae (en)
  • RR Lyrae type variable stars (en)
  • RR Lyrae variables (en)

Contributor

Editorial note

URI

http://astrothesaurus.org/uat/1410

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