Catalogue of wide binaries (Allen+ 2000)

Details Catalogue of wide binaries (Allen+ 2000) Catalogue of wide binaries (Allen+ 2000)

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..33560529a&link_type=abstract

VizieR On-line Data Catalog: J/A+A/356/529. Originally published in: 2000A&A...356..529A

Other

Stars: Double And Multiple, Magnitudes, Abundances: [Fe/H]

Scientific paper

The list contains a total of 131 binaries (115 systems) belonging to the halo or high-velocity disk. Of these, 122 correspond to wide binaries, that is, binaries with expected major semiaxes larger than 25 AU. The catalogue was constructed by identifying common proper-motion companions to the high-velocity and metal-poor stars studied by Schuster and collaborators (SN: Schuster and Nissen 1988A&AS...73..225S, SPC: Schuster, Parrao and Contreras, 1993, Cat. ). Based on Stromgren photometry, Schuster et al. obtained distances, metallicities and ages for their stars. For each star of the SN and SPC catalogues a machine search for common proper-motion companions was made among the NLTT (Cat. ) stars within 12 minutes of arc. This initial list was checked to avoid errors due to misidentifications, duplicate entries, etc., and was supplemented with some companions listed in the LDS (Luyten, 1987, Cat. ) and not present in the NLTT (mostly from the southern hemisphere), as well as with additional common-proper- motion companions found in the CCDM (Dommanget and Nys, 1994, Cat. ). Additional close companions found in the CCDM were retained only if an orbit was given, or if their separations were of less than 1". Wider companions were usually eliminated, unless convincing evidence of their sharing the proper motion of the primary was found. Distances to the primaries were updated using the Hipparcos (Cat. ) catalogue. The data in the list are as follows (for details see the main paper): The first column contains the Hipparcos number, when available. Column 2 contains other identifications of the star. In the third column its multiplicity is indicated. Column 4 contains the adopted distance to the star. Columns 5 and 6 contain the absolute visual magnitudes of the primary and secondary, respectively. The angular separation between the components is given in Column 7, and the expected value of the major semiaxes in Column 8. Columns 9 and 10 contain the metallicity of the primary and its age, as determined by Schuster and collaborators. The individual ages listed were kindly provided by W. J. Schuster. The peculiar velocity of the binary is given in Column 11. Columns 12 to 15 contain the main galactic orbital parameters; we list the apocentric distance, Rmax, as well as the maximum distance away from the galactic plane reached by the star |zmax|, and the three-dimensional eccentricity e of its galactic orbit. The last column contains various notes. (1 data file).