Member candidates of the star clusters from LAMOST DR2 data

Abstract

In this work, we provide 2189 photometric- and kinematic-selected member candidates of 24 star clusters from the LAMOST DR2 catalog. We perform two-step membership identification: selection along the stellar track in the color-magnitude diagram, i.e., photometric identification, and the selection from the distribution of radial velocities, i.e. the kinematic identification. We find that the radial velocity from the LAMOST data are very helpful in the membership identification. The mean probability of membership is 40\% for the radial velocity selected sample. With these 24 star clusters, we investigate the performance of the radial velocity and metallicity estimated in the LAMOST pipeline. We find that the systematic offset in radial velocity and metallicity are $0.85\pm 1.26$\,\kms\ and $-0.08\pm 0.04$\,dex, with dispersions of $5.47_{-0.71}^{+1.16}$\,\kms\ and $0.13_{-0.02}^{+0.04}$\,dex, respectively. Finally, we propose that the photometric member candidates of the clusters covered by the LAMOST footprints should be assigned higher priority so that more member stars can be observed.

arXiv commentaccepted, 63 pages

References in corpus (25)

• PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• The Pan-STARRS1 Photometric System
• The First Data Release (DR1) of the LAMOST general survey
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• Global survey of star clusters in the Milky Way II. The catalogue of basic parameters
• LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan
• The RAdial Velocity Experiment (RAVE): Fourth data release
• The SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters
• Automatic Determination of Stellar Atmospheric Parameters and Construction of Stellar Spectral Templates of the Guoshoujing Telescope (LAMOST)
• Coude-feed stellar spectral library - atmospheric parameters
• A systematic survey for infrared star clusters with |b|<20deg using 2MASS
• New infrared star clusters in the southern Milky Way with 2MASS
• New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS
• The LAMOST Stellar Parameter Pipeline at Peking University --- LSP3
• LAMOST Spectroscopic Survey of the Galactic Anti-centre (LSS-GAC): target selection and the first release of value-added catalogues
• A Catalogue of infrared star clusters and stellar groups
• The Open Cluster Chemical Analysis and Mapping Survey: Local Galactic Metallicity Gradient with APOGEE using SDSS DR10
• Global survey of star clusters in the Milky Way I. The pipeline and fundamental parameters in the second quadrant
• The SEGUE K giant survey II: A Catalog of Distance Determinations for the SEGUE K giants in the Galactic Halo
• Open Clusters as Galactic Disk Tracers: I. Project Motivation, Cluster Membership and Bulk Three-Dimensional Kinematics
• The binarity of Milky Way F,G,K stars as a function of effective temperature and metallicity
• A RAVE Investigation on Galactic open Clusters I. Radial velocities and metallicities
• A revolution in star cluster research: setting the scene
• Independent determination of the systematic and random errors of the proper motions in the PPMXL catalog using quasars

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• The Gaia-ESO Survey: Probes of the inner disk abundance gradient
• The Gaia-ESO survey: Calibrating a relationship between Age and the [C/N] abundance ratio with open clusters
• The Binarity of Early-type Stars from LAMOST Medium-resolution Spectroscopic Survey
• New halo stars of the Galactic globular clusters M3 and M13 in the LAMOST DR1 Catalog