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The Detection and Investigation of Exoplanets with MASTER Global Network Telescopes
Buckley, D. A. H.; Lipunov, V. M.; Budnev, N. M. +13 more
The paper presents the method for detecting exoplanets in the image archive obtained by telescopes of the MASTER Global Network since 2002. The unique archive represents homogeneous photometric data obtained over 20 years for the northern (MASTER-Amur, MASTER-Tunka, MASTER-Kislovodsk, M-ASTER-Tavrida, MASTER-IAC, MASTER-OAGH) and 11 years for the …
Study of Solar Motion and Galactic Kinematical Characteristics Using Recent Gaia Data
Elsanhoury, W. H.; Ayari, N.
Our objective is to construct models of the velocity ellipsoid and the retrieved Solar motion for program stars with 4924 points within the Solar neighborhood (∼2 kpc). In which 1374 early types (B5, A0, A5, F0, and F5) and about 3550 late types (G0, G5, K0, and K5) with more recent data source with Gaia DR3. Based on space velocity vectors $(\bar…
Is the Young Star Association ϵ Cha Double?
Bobylev, V. V.; Bajkova, A. T.
The kinematics of the ϵ Cha young stellar association close to the Sun has been studied based on a list of candidate stars from the Dickson-Vandervelde et al. work. The working sample consists of 26 stars with parallaxes, proper motions from the Gaia DR3 catalog and radial velocities taken from literary sources. The orbits of the stars back to the…
Unresolved Binary Systems with White Dwarfs in Open Star Clusters
Seleznev, A. F.; Mikhnevich, V. O.
We investigate unresolved binary systems with components of main sequence star (MS) and white dwarf (WD) in nine open clusters. These systems are located below and to the left of the main sequence on the color-magnitude diagram. We compare the number of cluster stars that have likely evolved into white dwarfs with the number of candidates for unre…
Kinematics of Fainst Stars of the Sco-Cen Association According to Gaia Catalog
Bobylev, V. V.; Bajkova, A. T.
The kinematic properties of the Sco-Cen association have been studied using the spatial velocities of young stars. New kinematic age estimates for the three components of the association with the age of UCL and LCC being
Modern Estimates of the Mass of the Milky Way
Bobylev, V. V.; Baykova, A. T.
A review of various methods used to estimate the mass of the Galaxy is given. Results obtained from the analysis of the galactic rotation curve, from the kinematics of dwarf satellite galaxies of the Milky Way, from globular clusters, from trails of dwarf galaxies, from distant halo stars, from escape velocities, from the dynamics of the Local Gro…
Kinematics of High-Velocity Stars within 300 pc from the Sun according to Gaia DR3
Vereshchagin, S. V.; Chupina, N. V.; Tutukov, A. V.
The kinematics of stars from the solar neighborhood with a radius of 300 pc has been studied using the Gaia DR3 data. Our sample includes n = 970 171 stars—AG300 (A—ensemble, G—Gaia, 300—radius of the studied zone in pc). The kinematics of these stars reflects the morphology of the main stellar populations of the Galaxy: the stellar disk, bulge, h…
Star Structure of the Northern Part of the Orion Sword Region
Vereshchagin, S. V.; Chupina, N. V.
According to the data of the Gaia DR3 catalogs, the belonging of the stars of group 189 ([1]), located in the northern part of the Orion Sword region, to the open star cluster (OSC) NGC 1977 was analyzed. To do this, the revision of the stellar composition of the northern part of the Orion Sword region (around the center of the OSC NGC 1977) was c…
GAIA Arguments for and against a Hypothetical Sun Companion
Malkov, O. Yu.
The hypothesis that the Sun is a component of a binary star system has been around for about a hundred years. Assumptions about the nature of the companion continue to be published as new observational data become available. The paper shows that the results of the work of the Gaia space observatory impose certain restrictions on the nature and loc…
The Catalog of Resolved Spectroscopic Binaries: Development and Description
Malkov, O. Yu.; Pakhomova, P. V.; Zeleke, D. B. +2 more
Resolved spectroscopic binaries are unique among other types of binaries. They provide the only possibility (aside from trigonometric parallaxes) to accurately determine distances to objects, which is one of the most important characteristics in astronomy. Such binaries are not numerous, but an exhaustive catalog of them still does not exist. The …