Search Publications
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 …
Mass determination for visual binaries
Cvetković, Z.; Ninković, S.
We consider a sample of 432 visual binaries having orbital elements and belonging to the Main Sequence. We calculate their total masses using the orbital elements and the new Hipparcos parallaxes by applying Kepler's third law. For the same pairs the total masses are also found by applying the mass-luminosity relation. The source for the apparent …
Three methods to identify local Galactic structures
Cubarsi, R.; Alcobé, S.; Vidojević, S. +1 more
Method one: by combining a sampling parameter related to an isolating integral of the stellar motion, an optimisation of the mixture approach, and a maximisation of the partition entropy for the constituent populations of the stellar sample. Method two: by segregating into different kinematical components in terms of the stellar orbital parameters…
Autocorrelation analysis of the Crimean and Hipparcos photometry of the runaway star HD 188001
Barannikov, A. A.
Crimean photoelectric photometry and Hipparcos epoch photometry of runaway star HD 188001 are presented. Data processing of this observation by a form of autocorrelation analysis confirms the periodic (P = 32.514~d) variability of this star.
Radial velocities of 35495 Hipparcos stars in a common system
Gontcharov, G. A.
The Pulkovo Compilation of Radial Velocities (PCRV) catalogue has been produced to study stellar kinematics in the local spiral arm. The PCRV contains the mean weighted absolute radial velocities of 35495 Hipparcos stars of various spectral types and luminosity classes over the whole celestial sphere mainly within the radius of 500pc from the Sun.…
The rotational vector of the Local Stellar System
Tsvetkov, A. S.
It is shown that the rotational vector of nearby stars derived from the proper motions of the Hipparcos catalogue is not perpendicular to the Galactic plane. We found that the rotation of stars nearer than 150 pc can be considered as the superposition of the Galactic rotation and the Local Stellar System rotation. The kinematics of stars which are…
Search for the periodicity in brightness and radial velocity variations of the runaway star HD 218915
Barannikov, A. A.
An analysis of the variations in the brightness and radial velocity of the high-velocity (runaway) star HD 218915 based on the author's ground-based Crimean observations and from Hipparcos data is presented. The analysis leads to the conclusion that there is a periodic component in the brightness and radial velocity variations of HD 218915. The pe…
Autocorrelation and Fourier analysis of the Crimean and Hipparcos photometry of the runaway star HD 192281
Barannikov, A. A.
New B sbnd V sbnd R photoelectric photometry of the runaway star HD 192281 combined with Hipparcos observations of this star show a periodic brightness variation with a period of 67.385 days.
Spectrophotometry of nine stars with planets
Tereschenko, V. M.
The energy distributions in the spectra of nine stars with planets were obtained from observations. The synthetic colour indices in the photometric UBV, WBVR and the Tycho catalogue systems were calculated on the basis of observations. The effective temperatures and metallicities of the investigated stars were determined by comparing the calculate…
Proper motions of open star clusters from Tycho-2 catalogue data
Beshenov, G. V.; Loktin, A. V.
The results of determinating the proper motions of open clusters on the basis of the Tycho-2 catalogue data are presented here. The resulting catalogue contains mean proper motions for 390 open clusters.