Studies of the open cluster M11. I. Proper motion measurement and membership determination.

Details Studies of the open cluster M11. I. Proper motion measurement and membership determination. Studies of the open cluster M11. I. Proper motion measurement and membership determination.

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cha%26a..21...50c&link_type=abstract

Chin. Astron. Astrophys., Vol. 21, No. 1, p. 50 - 58

Astronomy and Astrophysics

Astrophysics

Open Clusters: Proper Motions, Open Clusters: Membership

Scientific paper

From PDS microdensitometer measurements of 10 plate pairs of the open cluster M11 with epoch differences of 16 - 70 years the relative proper motions of 872 stars in the cluster region are determined. 85% of these have accuracies better than 0.1 arcsec per century. The distribution parameters of stars with different magnitudes are found from a new mathematical model. The membership probabilities of the stars are calculated. 541 stars have membership probabilities higher than 0.7.

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