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The Origin of the Solar Activity Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev, L. L. Kitchatinov
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Electromagnetic Field of a Charged Particle, Asymptotically Approaching Schwarzschild Black Hole Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. O. Komarov, A. K. Gorbatsievich, G. V. Vereshchagin, A. S. Garkun
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On the Influence of Pauli Blocking on Pair Creation in Strong Electric Field Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 M. A. Prakapenia, G. V. Vereshchagin
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Kinematics of High-Velocity Stars within 300 pc from the Sun according to Gaia DR3 Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 A. V. Tutukov, N. V. Chupina, S. V. Vereshchagin
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Radiative Transfer: Asymptotic Solution of the Kinetic Equation of Radiation Propagation, Asymptotic Approximation of the Nth Order and Refined Boundary Conditions Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Serov, S. S. Serova
Abstract A new asymptotic approximation of the nth order is proposed for use in calculations of radiation propagation in optically thick media without scattering; the asymptotic approximation is simpler and more accurate than the well-known diffusion approximation. It is shown that for optically thick media the asymptotic solution of the kinetic equation of radiation propagation without scattering
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The Formation and the Evolution of Large-Scale Vortex Structures in Stellar Accetion Disks Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 Z. D. Livenets, A. Yu. Lugovsky
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The Sun Emitting Light Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev
Abstract The paper considers the hypotheses put forward in the 19th and early 20th centuries to explain the phenomenon of solar luminosity.
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Spectral Survey of the Star Formation Region DR21OH in the 4-mm Wavelength Range Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. V. Kalenskii, E. A. Mikheeva
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The Sun at the Center of the World Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev
Abstract This paper is an essay on the evolution of ideas about the Sun in Europe during the Copernican Revolution.
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WIMPs in Dilatonic Einstein Gauss–Bonnet Cosmology Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 Anirban Biswas, Arpan Kar, Bum-Hoon Lee, Hocheol Lee, Wonwoo Lee, Stefano Scopel, Liliana Velasco-Sevilla, Lu Yin
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Peculiar Spectrum of the Water Maser in the Dark Nebula MSXDCG24.33+011 (G24.33+014) Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 I. E. Val’tts
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Solar Cycle Structure and Structure of Activity Cycles at Late-Type Stars Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 V. N. Obridko, D. D. Sokoloff, M. M. Katsova
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Dark Matter Halos in Numerical Models at Redshifts 0 ≤ z ≤ 9 Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 M. Demiański, A. Doroshkevich, T. Larchenkova, S. Pilipenko
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The Sun: Methodology, Theory, Practice Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev
Abstract The paper provides a general overview of the current state of solar research.
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The Sun: Dark and Cold Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev
Abstract This paper makes an attempt to describe the ideas about the Sun that dominated Europe in the 17th–19th centuries.
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Constraining Supernova Ia Progenitors by Their Locations in Host Galactic Discs Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 A. A. Hakobyan, A. G. Karapetyan, L. V. Barkhudaryan
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Solar Activity in Space and Time Astron. Rep. (IF 1.0) Pub Date : 2024-02-25 S. A. Yazev
Abstract The paper contains an overview of the phenomenology of solar activity cycles
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Modern Stellar Astronomy 2022 Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 O. Yu. Malkov, A. O. Zhukov, O. B. Dluzhnevskaya
Abstract We provide an analytic review of problems of the modern stellar astronomy, which is mostly based on talks presented at the twelfth annual conference on Modern Stellar Astronomy, held at the Caucasian Mountain Observatory of Sternberg Astronomical Institute, Moscow State University (Kislovodsk, Russia) in November 2022.
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The Near Infrared and Optical Photometric Activity of V517 Cyg Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 N. V. Efimova, V. P. Grinin, A. A. Arkharov, I. S. Potravnov, S. Yu. Melnikov, V. M. Larionov, S. A. Klimanov, D. L. Gorshanov
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Evolution of the X-ray Binary System Sco X-1 Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 A. V. Fedorova, A. V. Tutukov
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Statistics of Thermal Plasma Parameters and Non-Thermal X-Ray Spectra of Solar Flares with Helioseismic Response Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 I. N. Sharykin, I. V. Zimovets, A. G. Kosovichev
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A Planet or Primordial Black Hole in the Outer Region of the Solar System and the Dust Flow near Earth’s Orbit Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 Yu. N. Eroshenko, E. A. Popova
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Next Generation Gravity Missions: Studying the Possibilities of Multiple Constellations Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 A. I. Filetkin, A. S. Zhamkov, S. V. Ayukov, V. K. Milyukov
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Interaction of the Exoplanet Hat–P–11b with Stellar Wind Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 E. S. Belenkaya
Abstract We discuss possible existence of a magnetodisk around the exoplanet HAT–P–11b. We used available observations to determine properties of the exoplanet and the stellar wind passing by it and obtained a rough estimate of the size of the planet’s magnetosphere. Comparing our estimate to published results of computations in a 3D electromagnetic relativistic and collisionless particle-in-cell model
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Parameters of Radio Pulsars at Different Distances from the “Death Line” Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 Z. V. Ken’ko, I. F. Malov
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The Role of Oblateness in Shaping Stability and Zero Velocity Curves in the Perturbed Restricted Three-Body Problem Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 Dinesh Kumar, Ram Krishan Sharma
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On the Possibility to Estimate the Orbital Eccentricity of a Binary System with an Exoplanet from a Transit Light Curve Astron. Rep. (IF 1.0) Pub Date : 2024-01-09 E. V. Bekesov, M. K. Abubekerov, N. Yu. Gostev, A. M. Cherepashchuk
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Exploring the Perturbed Restricted Three-Body Problem under the Effect of Albedo and Straight Segment Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 Shipra Chauhan, Rajiv Aggarwal
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Influence of Radiation Forces on the Observed Position and Orbit Evolution of Space Debris Objects with High Area-to-Mass Ratio Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 T. N. Sannikova
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Observations of the Fast Radio Burst FRB 20220912A with the LPA LPI and Fast Radio Telescopes Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 V. A. Fedorova, A. E. Rodin, Zhi-Bin Zhang, Xiao-Fei Dong, Xiu-Juan Li, Di Li, Pei Wang, Jun-Shuo Zhang, Yong-Feng Huang, Fan Xu
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Activity Cycles of a Single G5 III–IV Giant HD 199178 Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 I. S. Savanov, A. N. Tarasenkov, N. N. Samus, E. S. Dmitrienko
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Kinetic Model of the Effect of the Stellar Wind on the Extended Hydrogen Atmosphere of the Exoplanet π Men c Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 A. A. Avtaeva, V. I. Shematovich
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Modified ShAO Spectrograph for Low-Resolution Spectra Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 N. Z. Ismailov, S. A. Alyshov, Sh. K. Ismailova, F. S. Huseynova
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Dedication to Mariy Anatolyevich Svechnikov Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 T. S. Polushina
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Confirmation of the New Evolutionary Status of UU Cas Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 S. Yu. Gorda
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Determination of the Close Binary Systems Parameters by Synthesis Methods: from White Dwarfs to Wolf–Rayet Stars and Black Holes Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 E. A. Antokhina, I. I. Antokhin
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Calibration of Uncertainties of the Gaia DR3 Catalog Based on Data on Wide Binary Stars of the Galaxy Field Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 D. A. Kovaleva
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The Role of Binary Stars in Understanding the Physics and Evolution of Stars Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 A. V. Tutukov
Abstract The diversity of close binary stars (CBSs) and the rich manifestation of their activity as a result of the interaction of stellar components have turned their observed family into a very developed and effective tool for studying the evolution of stars. This review presents the main features of modern ideas about the evolution of CBSs from their origin to the formation of finite compact remnants
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X-Ray Astronomy and Close Binary Systems Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 A. M. Cherepashchuk
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Extremely Wide Pairs in the World of Binary Stars Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 G. N. Dremova, V. V. Dremov, A. V. Tutukov
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Characteristics of Long-Term Spot Activity on Several Late-Spectral-Type Stars Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 A. V. Kozhevnikova, I. Yu. Alekseev, V. P. Kozhevnikov
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Distribution of Young Spectroscopic Binary Stars by Mass Ratio and Eccentricity Astron. Rep. (IF 1.0) Pub Date : 2023-12-11 O. V. Eretnova
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GRB-SN Association within the Binary-Driven Hypernova Model Astron. Rep. (IF 1.0) Pub Date : 2023-12-01
Abstract Long gamma-ray bursts (GRBs), in a few seconds, release luminosities (in gamma-rays) comparable to the luminosity of all stars in the observable Universe, which makes them detectable to the dawn of galaxy and stellar formation. One of the most striking observational properties of some of these sources is that they are accompanied by a supernova (SN) of type Ic, traditionally called GRB-SN
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Rate of Solar Nanoflares in Different Spectral Ranges Astron. Rep. (IF 1.0) Pub Date : 2023-12-01
Abstract The frequency and rate of solar nanoflares (NF) were measured in 6 coronal spectral ranges (094, 131, 171, 193, 211, 335 Å) and one, related to the transition layer (304 Å). We used SDO/AIA data obtained at solar minimum in May 2019. We analyzed the same region of the Sun, covering \(360'' \times 720''\) field-of-view, in all channels over the same time interval of 1 hour. In all the spectral
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Perturbed R3BP with Logarithmic Potential Astron. Rep. (IF 1.0) Pub Date : 2023-12-01
Abstract This paper investigates the dynamical behavior of the effects of perturbations on the motion of infinitesimal body in the restricted three-body problem (R3BP) with logarithmic potential where both spherical primaries are taken as source of radiation pressure and third infinitesimal body is considered as variable mass according to Jeans law. We also have taken the effects of coriolis and centrifugal
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Modern Estimates of the Mass of the Milky Way Astron. Rep. (IF 1.0) Pub Date : 2023-11-13 V. V. Bobylev, A. T. Baykova
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Thin and Thick Disks around Black Holes and Wormholes Astron. Rep. (IF 1.0) Pub Date : 2023-11-13 S. V. Chernov
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Astronomical and Cosmochemical Aspects of the Life Origin Problem Astron. Rep. (IF 1.0) Pub Date : 2023-11-13 M. Ya. Marov
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Neutron Stars in a Uniform Density Approximation Astron. Rep. (IF 1.0) Pub Date : 2023-11-13 G. S. Bisnovatyi-Kogan, E. A. Patraman
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Scale-Invariant Mode in Collisionless Spherical Stellar Systems Astron. Rep. (IF 1.0) Pub Date : 2023-11-01
Abstract An analytical solution for the perturbed equations, applicable to all ergodic models of collisionless spherical stellar systems with a single length parameter, has been derived. This solution corresponds to variations in this parameter, i.e., the expansion or contraction of the sphere while conserving total mass. During this process, the system maintains an equilibrium state. The simplicity
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Estimation of the Pulsar Braking Index Using the Evolution of the Rotational Kinetic Energy Loss Rate. Testing on the Crab Pulsar Astron. Rep. (IF 1.0) Pub Date : 2023-11-01
Abstract The slowdown mechanism of rotating neutron stars (NSs) has long been an important topic in pulsar astronomy, which is still an open question of detailed debate. It is widely understood that it arises from the loss of the rotational kinetic energy ( \(E\) ) through the magnetic dipole radiation (MDR). This simple model would lead to a relation \(\dot {\Omega } \propto {{\Omega }^{3}}\) , where
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On the Question of Localizing the Birthplaces of Coronal Mass Ejections on the Sun Astron. Rep. (IF 1.0) Pub Date : 2023-11-01
Abstract The localization of zones of occurrence of coronal mass ejections (CME) on the Sun in the period from November 2006 to February 2007 was studied according to the SOHO catalogue. A method for comparing such zones with active regions (ARs) on both the visible and invisible hemispheres of the Sun is described. It is shown that a simple linear continuation of the projections of the CME trajectory
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NO Biomarker: Transmission and Emission Methods for Its Potential Detection in Exoplanet Atmospheres with Spektr-UF (WSO-UV) Astron. Rep. (IF 1.0) Pub Date : 2023-11-01
Abstract Among all habitability factors for terrestrial exoplanets, one of the most important is the presence of a secondary N2–O2 dominant atmosphere on an exoplanet. This factor can potentially indicate the already existing geological and biological processes on the exoplanet. Meanwhile, direct characterization of the N2‒O2 atmospheres of terrestrial exoplanets is a difficult observational task.
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Gravitational Capture as a Possible Scenario Origin of the Moon Astron. Rep. (IF 1.0) Pub Date : 2023-11-01
Abstract The paper is devoted to the problem of the origin of the Moon. The discussed modern scenarios for the formation of the Earth–Moon system are: simultaneous formation of the Earth and the Moon in the circumsolar gas-dust disk; impact partial destruction of the Earth by a massive asteroid; gravitational capture of the Moon by the Earth; and destruction of the double Moon at the beginning when
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Long Magnetic Minimum of HD 166620—Possible Beginning of the Analog of the Maunder Minimum Astron. Rep. (IF 1.0) Pub Date : 2023-10-05 I. S. Savanov
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The Activity of a Solar-Type Star TOI-1422 and Mass Loss of the Atmosphere of the Planet TOI-1422b Astron. Rep. (IF 1.0) Pub Date : 2023-10-05 I. S. Savanov
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Investigation of the Magnetic Field from Observations of the OH Maser in the G10.624–0.385 Star Formation Region Astron. Rep. (IF 1.0) Pub Date : 2023-10-05 N. T. Ashimbaeva, E. E. Lekht, V. V. Krasnov, A. M. Tolmachev
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Investigation of the OH Maser Emission at 18 cm and Magnetic Field in the S128 Star Formation Region Astron. Rep. (IF 1.0) Pub Date : 2023-10-05 N. T. Ashimbaeva, E. E. Lekht, V. V. Krasnov, A. M. Tolmachev