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Accurate masses of very low mass stars
D. Ségransan 1,
X. Delfosse 2,
T. Forveille 1,3,
J.-L Beuzit 1,3,
S. Udry 4,
C. Perrier 1 and
M. Mayor 4
Received 21 July 2000 / Accepted 28 September 2000
We have obtained adaptive optics images and accurate radial velocities for 7 very low mass objects, In the course of a long term effort to determine accurate masses for very low mass stars (M0.6 ). We use the new data, together with measurements from the litterature for some stars, to determine new or improved orbits for these 7 systems. They provide masses for 16 very low mass stars with accuracies that range between 0.2% and 5%, and in some cases a very accurate distance as well. This information is used in a companion paper to discuss the Mass-Luminosity relation for the V, J, H and K photometric bands.
Key words: stars: binaries: general stars: binaries: spectroscopic stars: binaries: visual stars: low-mass, brown dwarfs techniques: radial velocities stars: late-type
* Based on observations made at the Observatoire de Haute Provence (CNRS), and at the CFH Telescope, operated by the NRCC, the CNRS and the University of Hawaii.
Send offprint requests to: Damien Ségransan (firstname.lastname@example.org)
Online publication: January 29, 2001