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Title

A multimembership catalogue for 1876 open clusters using UCAC4 data

AuthorsSampedro, Laura ; Dias, W.S.; Alfaro, Emilio J. ; Monteiro, H.; Molino, Alberto
KeywordsCatalogues
Methods: statistical
Open clusters and associations: general
Issue Date2017
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 470(4): 3937- 3945 (2017)
AbstractThe main objective of this work is to determine the cluster members of 1876 open clusters, using positions and proper motions of the astrometric fourth United States Naval Observatory (USNO) CCD Astrograph Catalog (UCAC4). For this purpose, we apply three different methods, all based on aBayesian approach, butwith different formulations: a purely parametric method, another completely non-parametric algorithm and a third, recently developed by Sampedro & Alfaro, using both formulations at different steps of the whole process. The first and second statistical moments of the members' phase-space subspace, obtained after applying the three methods, are compared for every cluster. Although, on average, the three methods yield similar results, there are also specific differences between them, as well as for some particular clusters. The comparison with other published catalogues shows good agreement. We have also estimated, for the first time, the mean proper motion for a sample of 18 clusters. The results are organized in a single catalogue formed by two main files, one with the most relevant information for each cluster, partially including that in UCAC4, and the other showing the individual membership probabilities for each star in the cluster area. The final catalogue, with an interface design that enables an easy interaction with the user, is available in electronic format at the Stellar Systems Group (SSG-IAA).© 2017 The Authors.
URIhttp://hdl.handle.net/10261/167410
Identifiersdoi: 10.1093/mnras/stx1485
issn: 1365-2966
Appears in Collections:(IAA) Artículos
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