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Astrometric investigation of visual binaries at Pulkovo
Romanenko, L. G.; Kalinichenko, O. A.
In the last 40 years the team headed by A.A. Kiselev at Pulkovo determined the orbits of 65 wide visual binaries and multiple stars. In most of the cases these studies are based on series of photographic observations made with the 26-inch refractor of Pulkovo observatory. Positional observations from Washington Double Star Catalog (WDS) were used …
Flares activity of selected stars from GTSh10 catalog by CRTS data
Gorbachev, M. A.; Shlyapnikov, A. A.
Based on the database of photometric observations of the CRTS project over an interval of more than 9 years, the activity of red dwarfs from the GTSh10 catalog was analyzed. The total number of analyzed objects, a list ares, amplitudes and moments of recorded events are presented. For the most interesting objects, from the point of view are activi…
Refined proper motions of some high-velocity stars
Dambis, A. K.; Rastorguev, A. S.; Zhuiko, S. V.
We improve the Gaia DR2 proper motions of nine high-velocity stars with the highest proper-motion errors. We reduce the transversal-velocity errors for our stars from to 1.5-746 km/s. We combine our refined proper motions with published radial-velocity and distance data to compute the orbits of these stars in terms of the axisymmetric potential mo…