A study of the astrometric motion of Barnard's star
- George D. Gatewood
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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.
Supplementary Material (0)
- Gatewood, G. 1987, Astron. J. 94, 213.
- Gatewood, G. and Eichhorn, H. 1973, Astron. J., 78, 777.
- 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.
- Huang, Su-Shu 1973, Icarus 18, 339.
- van de Kamp, P. 1963, Astron. J. 68, 515.
About this Article
- A study of the astrometric motion of Barnard's star
Astrophysics and Space Science
Volume 223, Issue 1-2 , pp 91-98
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- Kluwer Academic Publishers
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- 1. Allegheny Observatory, University of Pittsburgh, USA