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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…
Interpretation of the Transit Light Curve in the Presence of Principal Main Minimum with Allowance for the Eccentricity of the Transit (Planet) Orbit
Abubekerov, M. K.; Gostev, N. Yu.
Using a high-precision algorithm for interpreting transit light curves in a model of a classical eclipsing binary star-exoplanet system, we studied the possibility of determining the system parameters in the absence of a priori knowledge of the orbital eccentricity. It was shown that it is impossible to determine the exact value of the eccentricit…
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…
Determining the Structure of the Atmosphere Exoplanet HD 189733b Based on Multicolor Photometric Transit Observations
Bekesov, E. V.
In this paper, we analyze and interpret light curves obtained by observing with the HST telescope the transit of exoplanet HD 189733b across the disk of the star. Observations are carried out in a wide wavelength range of 5500–10 500 Å, which makes it possible to identify the relation between the wavelength and the data obtained during the interpr…
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…
Modeling of the Exoplanet HAT-P-11b Magnetosphere
Alexeev, I. I.; Belenkaya, E. S.; Kalegaev, V. V.
The magnetospheric model of the HAT-P-11b magnetic field has been constructed based on the available data on the magnetic field of the star HAT-P-11 and its closest exoplanet HAT-P-11b, as well as the information on the stellar wind in this system. It has been shown how the magnitude and orientation of the interplanetary magnetic field control the…
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…
Polarized Light from Accreting Low Mass X-Ray Binaries
Capitanio, F.; Farinelli, R.; Fabiani, S. +5 more
Thanks to IXPE, the X-ray spectro-polarimeter launched at the end of 2021, X-ray polarimetry has finally become an extraordinary tool in investigating the physics of accretion in low mass X-ray binaries. Similarly to what happened with gravitational waves, X-ray polarimetry would play a new complementary but at the same time fundamental role in th…