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Orbits of 47 dwarf satellite galaxies of the Milky Way in three models of the gravitational potential with different masses

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

The analysis of the orbits of 47 dwarf satellite galaxies of the Milky Way, built using three models of the galactic gravitational potential with different masses, is presented. The models of the galactic potential were chosen based on the analysis of a large number of the Galaxy mass estimates known from the literature. The astrometric data neede…

Comprehensive list of semi-detached double-lined eclipsing binaries with Gaia DR2 data

Malkov, O. Yu.

Semi-detached eclipsing systems play an important role in our understanding of stellar properties. In the present study, we have cross-matched a previously compiled comprehensive list of SD double-lined eclipsing binaries, containing 119 systems, with Gaia DR2, and analyze the result. A special analysis is conducted for systems with controversial …

Investigation of relative motion in the triple system ADS 48 on the basis of Gaia DR2 and Pulkovo 26-inch refractor observations

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

There are high-precision positions, proper motions, parallaxes and radial velocities at the instant 2015.5 for all three components of the star ADS 48 ABF in the catalog Gaia DR2 (2018). According to these data relative motions and the family of orbits were calculated by the Apparent Motion Parameters (AMP) method (Kiselev and Kiyaeva,1980), and t…