TERMIUM Plus®

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CEPHEIDE [2 records]

Record 1 1995-09-22

English

Subject field(s)
  • The Stars (Astronomy)
DEF

One of a subgroup of periodic variable stars whose brightness does not remain constant with time and whose period of variation is a function of intrinsic mean brightness.

DEF

A pulsating star with regular light variations.

DEF

one of a class of pulsating stars whose intrinsic light variations are very regular, occurring in periods up to two months.

French

Domaine(s)
  • Étoiles (Astronomie)
DEF

Étoile pulsante ]...] dont l’éclat varie suivant une période bien déterminée, s’échelonnant entre un jour et quelques semaines.

DEF

Étoile variable d’une famille caractérisée par des variations périodiques et dont le type est delta Céphée, d’où son nom.

OBS

Voir aussi «étoile variable».

Spanish

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Record 2 1977-09-22

English

Subject field(s)
  • Astronomy
OBS

Next to the long-period variables (...), the most common variable stars are the "RR Lyrae" stars, named for RR Lyrae, best known member of the group. (...) Almost all of them are found in the nucleus or the corona of our Galaxy or in globular clusters. In fact, nearly all globular clusters contain at least a few RR Lyrae variables, and some contain hundreds; these stars, therefore, are sometimes called "cluster-type" variables. The periods of RR Lyrae stars are less than 1 day; most periods fall in the range 0.3 to 0.7 day. (...) They are of spectral classes A or F.

French

Domaine(s)
  • Astronomie
OBS

Outre les céphéides, il existe encore quelques types de variables pulsantes (...) Parmi ces étoiles les plus connues sont celles du type RR Lyre appelées autrefois céphéides à courte période par suite de leurs caractéristiques qui ressemblent à celles des céphéides ordinaires (...) Les étoiles RR Lyre sont des géantes de la classe spectrale A. (...) Les périodes des étoiles RR Lyre s’échelonnent de 0,2 à 1,2 jour.

Spanish

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