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Article
Nonself-similar regimes of isothermal collapse of protostellar clouds
We consider the development of inhomogeneity in the isothermal collapse of protostellar clouds. The initial and boundary conditions correspond to the classical statement of the problem on the contraction of a ...
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Article
Evolution of collapse nonuniformity for rotating magnetic interstellar clouds
We investigate the formation and evolution of isothermal collapse nonuniformity for rotating magnetic interstellar clouds. The initial and boundary conditions correspond to the statement of the problem of homo...
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Article
A dynamic mesh adaptation method for magnetohydrodynamics problems
A dynamic adaptation method is used to numerically solve the MHD equations. The basic idea behind the method is to use an arbitrary nonstationary coordinate system for which the numerical procedure and the mes...
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Article
The matter-flow structure in the SS Cyg system in its quiescent state from comparisons of observational and synthetic Doppler tomograms
Doppler tomograms are constructed for the quiescent state of the SS Cyg system based on Hβ and Hγ spectral-line observations carried out in August 2006 with the 2-m telescope at Terskol Peak. Gasdynamical simulat...
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Article
Self-similar regimes for the collapse of magnetic protostellar clouds
Self-similar solutions describing the homogeneous, free, isothermal collapse of protostellar clouds are considered. One such solution correponds to the critical case of the propagation of a rarefaction wave ne...
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Article
Self-similar focusing of rarefaction waves in relativistic collapsing clouds
The development of an inhomogeneous collapse of an initially homogeneous cloud in pressure equilibrium with an external medium is considered in a general-relativistic treatment. It is shown that a rarefaction ...
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Article
Impact of the magnetic field on the structure of accretion disks in semi-detached binaries
We discuss characteristic features of the magnetic gas-dynamical structure of the flows in a semi-detached binary system obtained from three-dimensional simulations, assuming that the intrinsic magnetic field ...
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Article
Modeling of protostellar clouds and their observational properties
A physical model and two-dimensional numerical method for computing the evolution and spectra of protostellar clouds are described. The physical model is based on a system of magneto-gas-dynamical equations, i...
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Article
Magnetic-field structure in the accretion disks of semi-detached binary systems
The results of three-dimensional MHD numerical simulations are used to investigate the characteristic properties of the magnetic-field structures in the accretion disks of semi-detached binary systems. It is a...
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Article
On the Einstein forces of repulsion
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Article
Formation of accretion disks in close-binary systems with magnetic fields
We have developed a three-dimensional numerical model and applied it to simulate plasma flows in semi-detached binary systems whose accretor possesses a strong intrinsic magnetic field. The model is based on t...
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Article
Full 3D MHD calculations of accretion flow structure in magnetic cataclysmic variables with strong, complex magnetic fields
We have performed three-dimensional magnetohydrodynamical calculations of stream accretion in cataclysmic variable stars for which the white dwarf primary possesses a strong, complex magnetic field. These calc...
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Article
A possible mechanism for the formation of tilted disks in intermediate polars
Using 3D gas dynamics, we numerically simulate accretion-disk formation in typical cataclysmic variable intermediate polars with dipolar magnetic fields (B a = 105−5 × 105 G) and misaligned white-...
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Article
A multicomponent model for computing the thermal structure of collapsing protostellar clouds
A model for simulating the thermal and dynamical evolution of protostellar clouds is presented. In the model, the dust and gas temperatures are treated separately, making it possible to more precisely describe...
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Article
The influence of the inclination of the accretor’s magnetic axis on the accretion-disk structure in intermediate polars
Typical changes of the accretion-disk structures in intermediate polars are studied as a function of the inclination of the accretor’s magnetic field. Thre-dimensional numerical modeling was performed for seve...
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Article
The applicability of 3D Doppler tomography to studies of polars
The applicability of 3D Doppler tomography to map** gas flows in polars is considered. Synthetic profiles of emission lines are calculated using solutions (for the densities, temperatures, and velocity compo...
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Article
The thermal structure of a protostellar envelope
A numerical hydrodynamical model for the evolution of spherically symmetric collapsing clouds, designed for the calculation of the thermal structure of these objects in both the prestellar and protostellar sta...
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Article
A possible mechanism for the formation of humps in the orbital light curves of WZ Sge cataclysmic variable stars
A mechanism for the formation of humps in the light curves of WZ Sge cataclysmic variables is proposed, based on the results of three-dimensional simulations of the gas dynamics in the V455 And system. Analysi...
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Article
A numerical model for accretion in intermediate polars with dipolar magnetic fields
A three-dimensional numerical model for accretion in the magnetosphere of a white dwarf in a magnetic cataclysmic variable is developed. Themodel assumes that the white dwarf has a dipolar magnetic field with ...
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Article
Formation and evolution of inclined accretion disks in intermediate polars
The results of 3D modeling of the formation of the accretion disks of intermediate polars are presented. A model with misaligned rotation axes of accretor and the orbit is onsidered, in which it is assumed tha...
