Search Publications
Observations of NEO and Main Belt asteroids in 2018-2021 using the Baldone Schmidt telescope
Eglitis, I.; Bule, A.; Sokolova, A. +1 more
During 2018–2021 in the Baldone observatory, 49 new asteroids were discovered and more than 6000 astrometric positions for 1122 asteroids were published in MPC circulars. In this period in 221 observation nights, 5544 CCD images were obtained, which covered 648 square degrees of sky. Of them, about 1000 CCD images were devoted to studying the dyna…
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 …
Trace species in planetary atmospheres: Some results of TGO ExoMars
Korablev, O. I.
The presence of life alters the composition of a planet's atmosphere. This thesis, formulated back in the 1960s, is now gaining importance. The discovery or even suspicion of chemically non-equilibrium compounds in the atmosphere of another planets can infl uence space policies. The report reviews the discovery of phosphine on Venus and its possib…
Multiwavelength search for and studies of active galaxies
Mickaelian, A. M.; Abrahamyan, H. V.; Paronyan, G. M. +4 more
We present surveys and related studies of active galaxies carried out at the NAS RA V.Ambartsumian Byurakan Astrophysical Observatory (BAO). This has been one of the main research subjects at BAO for many years since the mid-1950s, when Viktor Ambartsumian suggested the hypothesis of the activity of the galactic nuclei. A number of surveys of and …
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…
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…
Chromospheric spicules and solar corona
Yakunina, G. V.; Porfir'eva, G. A.
Results of recent observations of chromospheric spicules on the Sun, obtained during the last decades, are briefly reviewed. Data on spicules of different types and their possible counterparts on the solar disk have been collected. Their properties, such as lifetimes, length, thickness, velocities, connection with underlying magnetic field and sup…