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Numerical simulations of gas-dynamical processes taking place in the accretion disk of a stellar binary system are presented. The initial state of the disk is an equilibrium gaseous configuration. Mechanisms for the development of spiral waves and associated variations in the angular momentum of the gas are considered. The influence of the ratio of the binary-component masses and the initial disk configuration are investigated. It is concluded that the existence of a steady-state disk is impossible without a flow of gas from the donor star. 相似文献
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Veselkin D. V. Tretyakova A. S. Senator S. A. Saksonov S. V. Mukhin V. A. Rozenberg G. S. 《Doklady Earth Sciences》2017,476(1):1113-1115
Doklady Earth Sciences - An analysis of data on the species abundance of flora in 89 cities (urban flora) of the Russian Federation facilitated determination of its main factors. It has been... 相似文献
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Ye. P. Velikhov A. Yu. Lugovsky S. I. Mukhin Yu. P. Popov V. M. Chechetkin 《Astronomy Reports》2007,51(2):154-160
We consider the origin and development of large-scale turbulence in a shear flow in a stellar accretion disk. The ratio of the kinetic energy of vortices originating in the turbulent flow and the total initial kinetic energy of the rotating disk is essentially constant. The large-scale structures that form are able to redistribute the angular momentum without any appreciable heating of the matter. 相似文献
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A. V. Deshcherevskii V. M. Mukhin A. Ya. Sidorin V. A. Gavrilov N. N. Smolina Yu. Yu. Yakovleva 《Journal of Volcanology and Seismology》2008,2(4):278-288
A local model has been developed for the Petropavlovsk-Kamchatskii Geodynamic Test Site; the model is concerned with the transformation of atmospheric precipitation in the snow cover and in the active soil layer. The input parameters of the model are standard hydrometeorological observations, the output consists in the variation of moisture content in the soil and evaporation from it. Data from water level monitoring carried out at the Site for the purpose of earthquake prediction were used to show how the output parameters can be utilized to reveal the water level variations in a well due to the moisture content variation in the upper crust. The procedure makes the data interpretation more correct. 相似文献
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A. V. Deshcherevskii V. M. Mukhin A. Ya. Sidorin 《Izvestiya Physics of the Solid Earth》2008,44(9):728-737
Local models of soil water input are constructed on the basis of water balance calculation for the active layer at four observation points of the Garm research area located at different hypsometric heights. Phase differences in model time series describing the processes of precipitation infiltration into soil at different stations are analyzed. The paper discusses the possibilities of using the obtained results for reinterpretation of the long-term data accumulated during joint monitoring of various geophysical parameters in the Garm research area that was conducted in the framework of earthquake prediction research. 相似文献
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We compare two-and three-dimensional modeling of gas-dynamical processes in the accretion disk of a binary system. The origin of spiral waves and the loss of the angular momentum related to them are considered. It is concluded that a steady state of the disk cannot exist without taking into account t he gas inflow from the donor star. 相似文献
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Pavlov K. I. Syrtsev A. V. Mukhin V. N. Archimuk A. N. Mikheeva E. A. Nikolaeva S. V. Andieva N. M. Kamenskaya V. G. Petrenko M. I. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(10):1465-1487
Izvestiya, Atmospheric and Oceanic Physics - The relevance of studying the influence of environmental factors on the psychophysiological characteristics of cognitive functions of cadets at a naval... 相似文献
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Cometary grains containing large amounts of carbon and/or organic matter (CHON) were discovered by in situ measurements of comet Halley dust composition during VEGA and GIOTTO flyby missions. In this paper, we report the classification of these cometary grains by means of cluster analysis, discuss the resulting compositional groups, and compare them with substances observed or hypothesized in meteorites, interplanetary dust particles, and the interstellar medium. Grains dominated by carbon and/or organic matter (CHON grains) represent approximately 22% of the total population of measured cometary dust particles. They usually contain a minor abundance of rock-forming elements as well. Grains having organic material are relatively more abundant in the vicinity of the nucleus than in the outer regions of the coma, which suggests decomposition of the organics in the coma environment. The majority of comet Halley organic particles are multicomponent mixtures of carbon phases and organic compounds. Possibly, the cometary CHON grains may be related to kerogen material of an interstellar origin in carbonaceous meteorites. Pure carbon grains, hydrocarbons and polymers of cyanopolyynes, and multi-carbon monoxides are present in cometary dust as compositionally simple and distinctive components among a variety of others. There is no clear evidence of significant presence of pure formaldehyde or HCN polymers in Halley dust particles. The diversity of types of cometary organic compounds is consistent with the interstellar dust model of comets and probably reflects differences in composition of precursor dust. Preservation of this heterogeneity among submicron particles suggests the gentle formation of cometary nucleus by aggregation of interstellar dust in the protosolar nebula without complete mixing or chemical homogenization at the submicron level. 相似文献
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Doklady Earth Sciences - A large data set (sample size >4000) of the decomposition rates of coarse woody debris was collected in field mass loss experiments along the macro-regional profile... 相似文献