Astrophysics and Space Science

, Volume 223, Issue 1–2, pp 91–98 | Cite as

A study of the astrometric motion of Barnard's star

  • George D. Gatewood


The Astrometric technique is unique in that it allows us to do a systematic search of each nearby star to determine whether or not it is the primary star of a planetary system. Both positive and negative results may be expressed with a well defined statistical certainty. Perhaps the best known astrometric study is that of Barnard's star by van de Kamp (1963). That “detection” was later discounted by Gatewood and Eichhorn (1973) but neither study attempted to specify what types (in mass and orbital period) of planets do not orbit Barnard's star. In the following pages we will relate the results of an ongoing study of that object, qualifying what types of bodies are unlikely to orbit Barnard's star, and showing what we believe to be the first step by step illustration of the various astrometric motions that must be analyzed in this study.


Orbital Period Systematic Search Ongoing Study Planetary System Nearby Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Gatewood, G. 1987, Astron. J. 94, 213.Google Scholar
  2. Gatewood, G. and Eichhorn, H. 1973, Astron. J., 78, 777.Google Scholar
  3. Gatewood, G., Kiewiet de Jonge, J., Stein, J., Han, I., and Breakiron, L. 1986 Astrophysics of Brown Dwarfs, pg. 104, ed. Minas Kafatos, Robert Harrington, and Steven Maran, Cambridge University Press.Google Scholar
  4. Huang, Su-Shu 1973, Icarus 18, 339.Google Scholar
  5. van de Kamp, P. 1963, Astron. J. 68, 515.Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • George D. Gatewood
    • 1
  1. 1.Allegheny ObservatoryUniversity of PittsburghUSA

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