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Astron. Astrophys. 353, 253-256 (2000)

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The nearby M-dwarf system Gliese 866 revisited *

J. Woitas 1, Ch. Leinert 1, H. Jahreiß 2, T. Henry 3, O.G. Franz 4 and L.H. Wasserman 4

1 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
2 Astronomisches Rechen-Institut, Mönchhofstrasse 12-14, 69120 Heidelberg, Germany
3 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138-1516, USA
4 Lowell Observatory, Flagstaff, AZ 86001-4499, USA

Received 24 August 1999 / Accepted 12 October 1999

Abstract

We present an improved orbit determination for the visual pair in the M-dwarf triple system Gliese 866 that is based on new speckle-interferometric and HST observations. The system mass is [FORMULA]. The masses of the components derived using the mass-luminosity relation are consistent with this mass sum. All three components of Gliese 866 seem to have masses not far from the hydrogen burning mass limit.

Key words: stars: individual: Gliese 866 – stars: binaries: visual – stars: low-mass, brown dwarfs – techniques: interferometric

* Based on observations collected at the German-Spanish Astronomical Center on Calar Alto, Spain, and at the European Southern Observatory, La Silla, Chile

Send offprint requests to: J. Woitas (woitas@mpia-hd.mpg.de)

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© European Southern Observatory (ESO) 2000

Online publication: December 8, 1999
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