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Article
Aeronomic Model of Hydrogen–Helium Upper Atmospheres of Hot Giant Exoplanets
The paper presents a one-dimensional aeronomic model of hydrogen–helium upper atmospheres of hot giant exoplanets based on the approximation of single-fluid multicomponent hydrodynamics. Chemical reactions and...
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Article
NO Biomarker: Transmission and Emission Methods for Its Potential Detection in Exoplanet Atmospheres with Spektr-UF (WSO-UV)
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 exis...
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Article
On the Possibility of Observing Nitric Oxide on Terrestrial Exoplanets Using the WSO-UV Observatory
It is generally believed that the presence of a \({{{\text{N}}}_{2}}{-} {{{\text{O}}}_{2}}\) -dominant atmosphere is...
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Article
Effect of the Orbit Eccentricity on the Flow in the Envelope of a Hot Jupiter
A three-dimensional numerical gas–dynamic model is presented. The aim of the model is to study the structure of the flow in the envelopes of hot Jupiters with elliptical orbits. To increase the speed and impro...
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Article
Effect of Magnetic Field Diffusion on the Structure of Extended Envelopes of Hot Jupiters
The paper presents a modification of the numerical MHD model of extended envelopes of hot Jupiters, in which the magnetic viscosity is considered. In the new version of the numerical model, we included the pro...
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Article
Numerical Model to Study Proton Polar Aurorae on Mars
We present a hybrid model and a magnetohydrodynamic (MHD) one for the solar wind plasma flow around Mars, which serve to calculate the flux of protons of the solar wind and the boundary of the induced magnetos...
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Article
First Telescope of the Russian–Cuban Observatory
Beginning of operation of the first Russian–Cuban Observatory telescope, a wide-field 20-cm robotic telescope installed at the observational site optical station in Havana, Republic of Cuba, is reported. The g...
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Article
WSO–UV Project: New Touches
Abstract—A general description is given of the international (with Russia as the key contributor) project World Space Observatory–Ultraviolet (WSO–UV; in Russian named SPEKTR–UF). The project is aimed at creating...
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Article
Self-Similar Perturbation of an Accretion Disc around Merging Black Holes
We study the possibility that merging of a binary black hole surrounded by a circumbinary accretion disc may produce an electromagnetic response. When black holes are merging, the mass of a target object decre...
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Article
A Kinetic Model for Precipitation of Solar-Wind Protons into the Martian Atmosphere
We present the kinetic Monte-Carlo model, which was developed to describe the influence of a proton flux from the undisturbed solar wind on the daytime atmosphere of Mars. For the first time, the degradation o...
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Article
MHD Model of the Interaction of a Coronal Mass Ejection with the Hot Jupiter HD 209458b
Most hot Jupiters have extended envelopes of gas that spread beyond their Roche lobes. A typical envelope is weakly gravitationally bound to the planet and, therefore, its structure and properties are strongly...
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Article
Three-Dimensional Model of the Flow Structure in the Asynchronous Polar CD Ind during Magnetic Pole Switching
We performed a three-dimensional numerical MHD simulation of the flow structure in the asynchronous polar CD Ind during the switching phases between the magnetic poles of the accretor—a white dwarf. To account...
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Article
Life as the Only Reason for the Existence of N2–O2-Dominated Atmospheres
The Earth’s N2-dominated atmosphere is a very special feature. Firstly, N2 as main gas is unique on terrestrial planets in the inner Solar System and gives a hint for tectonic activity. Studying the origins of at...
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Article
Effect of Variations in the Extended Hydrogen Corona of Mars on the Efficiency of Charge Exchange with Solar Wind Protons
This paper presents the results of calculating the efficiency of solar wind proton charge exchange as a function of variations in the column density of hydrogen atoms in the extended corona of Mars. The presen...
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Article
Migration of Hot Jupiters Induced by Atmosphere Outflow
As is known, the influence of the ionizing radiation and the gravity of a star on a hot Jupiter results in the outflow of its atmosphere. Due to the gravity of the planet, the outflowing matter acquires angula...
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Article
Kinetic Calculations of the Charge Exchange Efficiency for Solar Wind Protons in the Extended Martian Hydrogen Corona
Model calculations of the charge exchange efficiency for solar wind protons colliding with hydrogen atoms of the extensive Martian corona are presented. It is shown that the energy spectrum of hydrogen atoms p...
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Article
Possible New Envelope Types of Hot Jupiters
Abstract—For the case of the sub-Alfvén regime of the stellar wind flyby around the planet, the flow structure in the vicinity of a hot Jupiter have been studied by three-dimensional numerical simulation. As an e...
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Article
Three-Dimensional Numerical Simulation of a Flow Structure in the Asynchronous Polar CD Ind in the Approximation of an Offset Dipole Magnetic Field of a White Dwarf
The flow structure in the asynchronous polar CD Ind was investigated in the approximation of an offset dipole. Computation results made it possible to identify such system features as the drift of hot spots ov...
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Article
The Orientation Influence of a Hot Jupiter’s Intrinsic Dipole Magnetic Field on the Flow Structure in Its Extended Envelope
The orientation parameter effect of a hot Jupiter’s intrinsic dipole magnetic field on the flow structure in an extended gaseous (ionospheric) envelope of the planet is studied with a three-dimensional numeric...
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Article
Coronal Mass Ejection Effect on Envelopes of Hot Jupiters
Abstract—Currently, hot Jupiters have extended gaseous (ionospheric) envelopes extending far beyond the Roche lobe. The envelopes are loosely bound to the planet and are subject to a strong influence by stellar w...
