Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
A.A. Tokovinin, Y.Y. Balega, K.-H.
Hofmann, and G. Weigelt:
The orbit of the nearby low-mass binary
Gliese 600
Astronomy Letters 26, 668-671 (2000)
Abstract.
We have computed a combined spectroscopic-interferometric orbit for the
nearby binary Gliese 600 discovered by us. The orbital period is 2.78
years, and the semimajor axis is 100 mas (0.1"). Its M0 V
components are almost identical and have a mass of 0.5M. The mass ratio
is uncertain because of the low radial-velocity semiamplitude (7 km/s)
associated with the low orbital inclination (37°). The
orbital parallax of the binary (52 ± 11 mas) matches its dynamical and
photometric parallaxes but differs significantly from the Hipparcos
parallax (44.3 ± 1.6) mas; the latter was probably distorted by the
orbital motion that was not taken into account.
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