Titre du document

The Main Sequence Gap and Red Giant Clump of NGC 6939

Lien vers le document
Nom du Corpus

AstroConcepts

Auteur(s)
  • R. D. Cannon
  • C. Lloyd
Résumé

New photographic photometry is given for the open cluster NGC 6939. Using earlier proper motion measurements, a colour–magnitude diagram is obtained for those stars believed to be cluster members. The cluster appears to have an age of about 109 years, and has a low density region on the main sequence in agreement with a theoretically predicted gap. The red giant branch shows one very marked concentration which is tentatively identified with the horizontal branch found in globular clusters. There are a few anomalous bright blue stars, similar to those in other old clusters, well above the main sequence turn-off.

Langue(s) du document
Indéterminé
Année de publication
1969
Revue

Monthly Notices of the Royal Astronomical Society

Éditeur
OUP
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Non
Version de PDF
1.4
Score de qualité du texte
3.189
Nom du concept
  • Blue stragglers
Catégories Science-Metrix
  • 1 - natural sciences ; 2 - physics & astronomy ; 3 - astronomy & astrophysics
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
  • 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Astronomy and Astrophysics
Catégories WoS
  • 1 - science ; 2 - astronomy & astrophysics
Identifiant ISTEX
022168284BBB995384A4D876C6CAD16A57248343
ark:/67375/HXZ-X1NNTX5L-2
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