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Pavel Parenago and His Name in Science
AbstractThe short biography of one of the founders of stellar astronomy as a science, Pavel Petrovich Parenago, is presented. Considered the question...
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Confirmation of the New Evolutionary Status of UU Cas
AbstractA new spectral study of the close binary system (CBS) UU Cas with massive components was carried out, based on spectra obtained on the...
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Discovery of eclipses in the cataclysmic variable ASASSN-V J090756.65+715859.5
I conducted photometry of the cataclysmic variable ASASSN-V J090756.65+715859.5 and detected eclipses that were not previously known. I observed 12...
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New Type of Antiwear Additives Based on Quaternary Ammonium Salts of Dialkyldithiocarbamic Acids for Silicone Lubricants
Abstract —A method is proposed for the preparation of antiwear additives based on quaternary ammonium salts of dialkyldithiocarbamic acids by...
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Selected Problems of Classical and Modern Celestial Mechanics and Stellar Dynamics: I–Classical Results
AbstractA review is given, in the modern context of applications, of the major important scientific results obtained by scientists and graduates of...
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Modeling the Rotation Curve of Disk Galaxies
AbstractThe present paper suggests an exact solution of the Poisson equation which appears infrequently addressed in applications regarding the...
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The Physical Parameters of V680 Mon—Eclipsing Star with the Highest Known Eccentricity
AbstractWe present the first high accuracy UBVRI ( RI ) c CCD light curves of the poorly investigated eclipsing system V680 Mon = GSC 7428 218 ( P = 8.54 d ...
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A Double Wave in the Orbital-period Variations of the Eclipsing Binary RT Per
Orbital-period variations of the low-mass, semi-detached eclipsing binary RT Per are analyzed. In addition to the secular variation of the orbital...
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Destruction of Galaxies as a Cause of the Appearance of Stellar Streams
AbstractThe interaction of galaxies in clusters with the intergalactic gaseous medium and other galaxies is considered. The causes for the appearance...
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New Expansion Rate Estimate of the Scorpius–Centaurus Association Based on T Tauri Stars from the Gaia DR2 Catalog
AbstractThe kinematic properties of the Scorpius–Centaurus association were studied using spatial velocities of approximately 700 young T Tauri...
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Close Binary Stars. VII: On the Evolution of Close Binary Systems
AbstractThe article considers various aspects of the evolution of close binary systems (CBSs). The variation in the orbital parameters of a CBS...
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Orbital-Period Variations of the Eclipsing Binaries RY Aur, GG Cas, RS Lep, and RV Tri
Variations of the orbital periods of the eclipsing binaries RY Aur, GG Cas, RS Lep, and RV Tri are analyzed. The period variations in all of these...
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General Introduction
This chapter is dedicated to explain the basic information of dwarf novae, which is necessary to understand the following chapters, and to present...
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The Light-time Effect in the Eclipsing Binaries with Early-type Components U CrB and RW Tau
A detailed study of the orbital-period variations of the Algol-type eclipsing binaries with earlyspectral- type primary components U CrB and RW Tau...
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New Features of Parenago’s Discontinuity from Gaia DR1 Data
The velocity field of main-sequence stars and red giants from the TGAS catalogue with heliocentric distances up to 1.5 kpc has been analyzed for...
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Cyclic Orbital-period Variations in Eclipsing Binary Systems with Rapid Period Decreases: TU Her, TY Peg, and Y Psc
Cyclic variations of the orbital period superposed on a secular period decrease have been found for the Algol-type eclipsing binaries TU Her, TY Peg,...
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Orbital period variations of the eclipsing binaries TU Cnc, VZ Leo, and OS Ori
Variations of the orbital periods of the eclipsing binaries TU Cnc, VZ Leo, and OS Ori are analyzed. Secular period decreases were earlier believed...
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Systematic error of the Gaia DR1 TGAS parallaxes from data for the red giant clump
Based on the Gaia DR1 TGAS parallaxes and photometry from the Tycho-2, Gaia, 2MASS, andWISE catalogues, we have produced a sample of ~100 000 clump...