Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..131...89t&link_type=abstract
Astronomy and Astrophysics Supplement, v.131, p.89-98
Astronomy and Astrophysics
Astrophysics
9
Open Cluster: Ngc 1750, Ngc 1758, Astrometry
Scientific paper
The kinematic state of the open clusters NGC 1750 and NGC 1758 has been studied using newly determined proper motions for 540 stars in a field of 1.5 deg x 1.5 deg in the Taurus dark cloud region. The proper motions are obtained from the reduction of PDS measurements of 20 plates that span a total time interval of 68 years, resulting in an average proper motion accuracy of 0.67 mas/yr. These proper motions are used to determine the membership probabilities of stars in the region by means of a new, improved method described in this paper. Of the 540 stars analyzed here, 332 are found to be probable members of NGC 1750, and 23 are probable members of NGC 1758. The core radii of NGC 1750 and NGC 1758 are determined to be 17'2 and 2'25 respectively.
Shao Zh.-Y.
Stetson Peter B.
Tian Kai-Ping
Zhao Jian-Ling
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