Open clusters: their kinematics and metallicities

L. Chen*, J. L. Hou, J. L. Zhao, R. de Grijs

*Corresponding author for this work

Research output: Contribution to journalConference paperpeer-review


We review our work on Galactic open clusters in recent years, and introduce our proposed large program for the LOCS (LAMOST Open Cluster Survey). First, based on the most complete open clusters sample with metallicity, age and distance data as well as kinematic information, some preliminary statistical analysis regarding the spatial and metallicity distributions is presented. In particular, a radial abundance gradient of 0.058± 0.006 dex kpc -1 is derived. By dividing clusters into the age groups we show that the disk abundance gradient was steeper in the past. Secondly, proper motions, membership probabilities, and velocity dispersions of stars in the regions of two very young open clusters are derived. Both clusters show clear evidence of mass segregation, which provides support for the "primordial" mass segregation scenario. Based on the advantages of the forthcoming LAMOST facility, we have proposed a detailed open cluster survey with LAMOST (the LOCS). The aim, feasibility, and the present development of the LOCS are briefly summarized.

Original languageEnglish
Pages (from-to)433-439
Number of pages7
JournalProceedings of the International Astronomical Union
Issue numberS248
Publication statusPublished - Oct 2007
Externally publishedYes
EventInternational Astronomical Union Symposium (2007): A Giant Step: From Milli- to Micro- Arcsecond Astrometry - Shanghai, China
Duration: 15 Oct 200719 Oct 2007


  • galaxy: disk
  • open clusters and associations: general
  • open clusters and associations: individual (NGC2244)
  • open clusters and associations: individual (NGC6530)


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