Membership of the old open cluster NGC 2506

Details Membership of the old open cluster NGC 2506 Membership of the old open cluster NGC 2506

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..827c&link_type=abstract

Astrophysical Journal, Part 1, vol. 243, Feb. 1, 1981, p. 827-840. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

28

Astrometry, Open Clusters, Star Distribution, Stellar Luminosity, Stellar Motions, Binary Stars, Giant Stars, Imaging Techniques, Tables (Data), Velocity Distribution

Scientific paper

Relative proper motions for 724 stars in the region of the open cluster NGC 2506 have been determined from plates taken with the Mount Wilson 1.5 m reflector and the Cerro Tololo Yale 1 m reflector. Probabilities of membership are derived. Some blue stragglers and binary stars are confirmed as cluster members. Stars with V less than or equal to 16 (including giants, subgiants, and upper part of the main sequence) appear to have a more concentrated radial distribution than stars with V greater than 16 (lower main sequence). The luminosity function of the cluster is probably decreasing for V greater than 16. Several possible interpretations are discussed.

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