Search Publications

On the Motion of Stars in the Pleiades According to Gaia DR2 Data

Danilov, V. M.; Seleznev, A. F.

—Several parameters of the Pleiades cluster were estimated. We used Gaia DR2 data on the coordinates, proper motions, and radial velocities of stars in regions with radius d° =2.5° and size 60° × 60° around the cluster center. Based on data on stars with magnitudes m_G ≤ 18^m, we constructed a map and profile of the density, lu…

Globular Clusters Lost by the Sagittarius Dwarf Spheroidal Galaxy

Sharina, M. E.; Arakelyan, N. R.; Pilipenko, S. V.

—In this work a search was carried out for globular clusters belonging to the Sagittarius (Sgr) tidal stream using the analysis of spatial positions, radial velocities relative to the Galactic Standard of Rest (V_GSR), proper motions and ratio of "age–metallicity" ([Fe/H]) for globular clusters and for stars in the tidal stream. As a res…

Estimation of the Gould Belt Scale Height from T Tauri Type Stars in the Gaia DR2 Catalog

Bobylev, V. V.; Bajkova, A. T.

—We analyze the spatial and kinematic properties of a large sample of young T Tauri type stars in a 500 pc radius solar neighborhood, closely related to the Gould belt. The following parameters of the exponential density distribution have been determined: the average $${{({{z}_{{\text{G}}}})}_{ \od…

Relative Motion in the Hierarchical Triple System ADS48 on the Basis of Gaia DR2 and 26-Inch Refractor of Pulkovo Observatory Data

Zhuchkov, R. Ya.; Kiyaeva, O. V.; Izmailov, I. S.

—According to the exact positions and proper motions of the three components of the star ADS48 from Gaia DR2, their parallax and radial velocities for the epoch 2015.5 the instantaneous relative positions and motions of the components were determined. Only from the Gaia DR2 observations, the family of orbits of the AB pair was calculated by the me…