Search Publications
Studies of Modern Star Catalogs Based on Photoelectric Observations of Lunar Occultations of Stars
Churkin, K. O.; Andreev, A. O.; Nefedyev, Yu. A. +2 more
An important area of investigation in astronomy is the relationship between fundamental and dynamical coordinate systems. Valuable material for such studies is provided by photoelectric occultation observations of stars by the Moon, which can provide high precision of detecting rapidly occurring processes and have been carried out over a long time…
A dynamical study of the multiple system 17 Cygni ABFG
Romanenko, L. G.
Adynamical study of the relative motions of the components of the inner pairs AB (ADS 12913) and FG (ADS 12889) of the quadruple heirarchical system 17 Cygni (WDS 19464+3344) is presented, as well as analysis of themotions of the outer pair AB-FG. The study is based on CCD observations obtained on the 26-inch refractor of the Pulkovo Observatory (…
Pulkovo catalog of relative positions and motions of visual double and multiple stars from photographic observations with the 26-inch refractor in 1960-2007
Kiselev, A. A.; Romanenko, L. G.; Kiyaeva, O. V. +7 more
The results of long-term, uniform, photographic observations of visual double and multiple stars obtained on the Pulkovo 26″ refractor are presented. Relative positions are calculated for 259 pairs of visual double stars in 194 systems, with the relative motions also computed for 127 pairs. Lower limits for the total masses of the systems for whic…
Orbits of four visual binaries determined from observations along short arcs
Kiselev, A. A.; Romanenko, L. G.
The orbits of the four visual binaries ADS 246 (GL 15), ADS 7724 ( γ Leo), ADS 10386 (GJ 659), and ADS 14909 (1 Peg) have been determined using the apparent motion parameters (AMP) method. The orbital periods of these stars are 1200, 550, 7500, and 18 000 yr, respectively. The orbits were calculated based on observations along short arcs obtained …
Rotation of the Hyades derived from Hipparcos data
Vereshchagin, S. V.; Reva, V. G.; Chupina, N. V.
Data from the Hipparcos catalog are used to study the internal kinematics of the Hyades cluster. Cluster members whose proper motions and parallaxes are known with precisions not less than 5 mas/yr and 3 mas were used. The proper motions were reduced to the cluster center. A correlation between a component of the tangential velocity and the parall…
Orbits of the visual binaries ADS 8814 and ADS 8065 from observations along a short arc
Kiselev, A. A.; Romanenko, L. G.; Kiyaeva, O. V. +1 more
The orbits of the visual binaries ADS 8814 and ADS 8065 are determined for the first time. The orbits were calculated using the parameters of the apparent motion, based on position observations along short arcs obtained on the 26-inch refrector of the Pulkovo Observatory, supplemented with radial-velocity observations for the stellar components in…
Dynamical study of the wide visual binary ADS 12815 (16 Cyg)
Kiselev, A. A.; Romanenko, L. G.
A homogeneous series of photographic position measurments of the visual binary ADS 12815 obtained on the 26-inch refractor of the Pulkovo Observatory (1960-2007) is analyzed. The Pulkovo observations allow for the existence of the planet around component B discovered by Cochran et al. based on radial-velocity measurements. The orbit of the planet …
The inverse problem of the theory of degenerate dwarfs
Vavrukh, M. V.; Smerechynskyi, S. V.; Tyshko, N. L.
Based on the radii and masses of degenerate dwarfs derived from HIPPARCOS and other observations, we estimate the microscopic parameters of a Chandrasekhar model (the relativistic parameter at the stellar center x 0, and the chemical-composition parameter µ e = A/Z, where A is the mass number and Z is the nuclear charge). We…
A dynamical study of 12 wide visual binaries
Romanenko, L. G.; Kalinichenko, O. A.; Kisselev, A. A.
We have carried out the first dynamical studies of the relative motions of the components of 12 wide binaries: ADS 497, ADS 2427 (GL 130.1), ADS 3593, ADS 5436, ADS 6646, ADS 6783, ADS 9559 ( δ Boo), ADS 10329, ADS 10759 ( ψ Dra), ADS 14878, ADS 15229, and ADS 16558. The analysis is based on series of photographic observations made with the 26-inc…
A dynamical study of the wide hierarchic triple star ADS 10288
Kiselev, A. A.; Romanenko, L. G.; Gorynya, N. A.
We have performed the first dynamical study of the relative motions of the components of the wide hierarchic triple star system ADS 10288 (GL 649.1 = WDS 16579+4722), based on a 15-year series of photographic observations with the 26″ Pulkovo refractor, supplemented with data from the WDS catalog, HIPPARCOS parallaxes, and radial velocities of the…