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Proper motions of the optically visible open clusters based on the UCAC4 catalog

Dias, W. S. ; Monteiro, H. ; Caetano, T. C. ; Lépine, J. R. D. ; Assafin, M. ; Oliveira, A. F.

Astronomy and astrophysics (Berlin), 2014-04, Vol.564, p.np-np [Periódico revisado por pares]

EDP Sciences

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  • Título:
    Proper motions of the optically visible open clusters based on the UCAC4 catalog
  • Autor: Dias, W. S. ; Monteiro, H. ; Caetano, T. C. ; Lépine, J. R. D. ; Assafin, M. ; Oliveira, A. F.
  • Assuntos: Clusters ; Open clusters ; open clusters and associations: general ; Radial velocity ; Samples ; Stars ; Statistical analysis ; Statistical methods
  • É parte de: Astronomy and astrophysics (Berlin), 2014-04, Vol.564, p.np-np
  • Notas: e-mail: wiltonsdias@yahoo.com.br
    istex:67999CFEC143B71FDDCEBD3FBE4867A990CD24FB
    ark:/67375/80W-G03KG69D-D
    Tables 2 to 1809 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/564/A79
    dkey:10.1051/0004-6361/201323226
    publisher-ID:aa23226-13
    bibcode:2014A%26A...564A..79D
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: We present a catalog of mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC4 catalog in a homogeneous way. The mean proper motion of the cluster and the membership probabilities of the stars in the region of each cluster were determined by applying the statistical method in a modified fashion. In this study, we applied a global optimization procedure to fit the observed distribution of proper motions with two overlapping normal bivariate frequency functions, which also take the individual proper motion errors into account. For 724 clusters, this is the first determination of proper motion, and for the whole sample, we present results with a much larger number of identified astrometric member stars. Furthermore, it was possible to estimate the mean radial velocity of 364 clusters (102 unpublished so far) with the stellar membership using published radial velocity catalogs. These results provide an increase of 30% and 19% in the sample of open clusters with a determined mean absolute proper motion and mean radial velocity, respectively.
  • Editor: EDP Sciences
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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