Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-11
Astronomy and Astrophysics
Astrophysics
1 page, Poster presented at IAU Symp. 200, The Formation of Binary Stars, Potsdam(Germany), 10-15 April 2000. To be published
Scientific paper
The comparison of quasi-instantaneously measured HIPPARCOS proper motions with long-term averaged proper motions, derived from ground-based data, allows the identification of many stellar objects as Delta_mu binaries (Wielen et al., 1999, A&A 346, 675). We have used this method to find Delta_mu binaries among the fundamental stars, among the GC stars, and among the Tycho-2 stars. A finding list for about 4000 Delta_mu binaries is given under the URL http://www.ari.uni-heidelberg.de/dmubin in a machine-readable format. This information on the probable duplicity of the listed objects can be used for planning specific observing programs, for improving our knowledge of binary statistics, or for avoiding the use of these binaries in some astrophysical calibrations or as astrometric reference stars.
Dettbarn Christian
Jaehrling Rainer
Jahreiss Hartmut
Lenhardt Helmut
Schwan Heiner
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