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Orbits of new Hipparcos binaries: III

Balega, Yu. Yu.; Balega, I. I.; Malogolovets, E. V.

We present apparent orbits and fundamental parameters of three pairs of early M-type dwarfs. The orbital elements are determined from speckle interferometric observations at the 6-m BTA telescope of the Special Astrophysical Observatory. The orbits of two pairs, HIP39402 and HIP 104565 are built for the first time. The orbit of HIP106972 is revise…

Kinematics of high proper motion stars determined from high resolution spectra in ground-based ultraviolet

Klochkova, V. G.; Tavolganskaya, N. S.

Radial velocities for 15 stars with high proper motions were measured as a result of spectral observations, conducted with the NES echelle spectrograph of the 6-m BTA telescope in the wavelength range of 3550–5100 Å with a spectral resolution of R=60000. The standard deviation of the measured velocity does not exceed σ ≤ 0.9 km/s for the stars wit…