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1.
V. S. Belyaev G. S. Bisnovatyi-Kogan A. I. Gromov B. V. Zagreev A. V. Lobanov A. P. Matafonov S. G. Moiseenko O. D. Toropina 《Astronomy Reports》2018,62(3):162-182
The results of MHD numerical simulations of the formation and development of magnetized jets are presented. Similarity criteria for comparisons of the results of laboratory laser experiments and numerical simulations of astrophysical jets are discussed. The results of laboratory simulations of jets generated in experiments at the Neodim laser installation are presented. 相似文献
2.
Kleimenova N. G. Gromova L. I. Gromov S. V. Malysheva L. M. 《Geomagnetism and Aeronomy》2021,61(4):520-530
Geomagnetism and Aeronomy - The features of the geomagnetic effect of the approach of an interplanetary magnetic cloud to the Earth’s magnetosphere during the recovery phase of a strong... 相似文献
3.
L. I. Gromova N. G. Kleimenova A. E. Levitin S. V. Gromov L. A. Dremukhina N. R. Zelinskii 《Geomagnetism and Aeronomy》2016,56(3):281-292
The high-latitude geomagnetic effects of an unusually long initial phase of the largest magnetic storm (SymH ~–220 nT) in cycle 24 of the solar activity are considered. Three interplanetary shocks characterized by considerable solar wind density jumps (up to 50–60 cm–3) at a low solar wind velocity (350–400 km/s) approached the Earth’s magnetosphere during the storm initial phase. The first two dynamic impacts did not result in the development of a magnetic storm, since the IMF Bz remained positive for a long time after these shocks, but they caused daytime polar substorms (magnetic bays) near the boundary between the closed and open magnetosphere. The magnetic field vector diagrams at high latitudes and the behaviour of high-latitude long-period geomagnetic pulsations (ipcl and vlp) made it possible to specify the dynamics of this boundary position. The spatiotemporal features of daytime polar substorms (the dayside polar electrojet, PE) caused by sudden changes in the solar wind dynamic pressure are discussed in detail, and the singularities of ionospheric convection in the polar cap are considered. It has been shown that the main phase of this two-stage storm started rapidly developing only when the third most intense shock approached the Earth against a background of large negative IMF Bz values (to–39 nT). It was concluded that the dynamics of convective vortices and the related restructing of the field-aligned currents can result in spatiotemporal fluctuations in the closing ionospheric currents that are registered on the Earth’s surface as bay-like magnetic disturbances. 相似文献
4.
A. E. Levitin L. I. Gromova S. V. Gromov L. A. Dremukhina 《Geomagnetism and Aeronomy》2014,54(3):292-299
A new method for determining geomagnetic activity based on calculation of the hourly amplitudes of geomagnetic field variations at ground-based observatories has been developed. Observations performed in 2009, when unusually low solar and geomagnetic activity was registered, were used as a reference level. The described method was used to estimate the energy of local geomagnetic activity; such energy is estimated for observatories in the Earth’s Northern and Southern hemispheres, and a total estimation is made for both hemispheres and for the entire Earth’s surface during large magnetic storms. These are used to compare characteristics of magnetic storm intensity based on the classical Kp and Dst indices and calculated energy estimate. 相似文献
5.
Astronomy Letters - Techniques for solving the problem of constructing a Stäckel model by generalizing the potential from the equatorial plane to the entire space are considered. The initial... 相似文献
6.
Physical and Mechanical Properties of Lunar and Planetary Soils 总被引：3，自引：0，他引：3
Earth, Moon, and Planets - 相似文献
7.
L Richter P CosteV.V Gromov H KochanR Nadalini T.C NgS Pinna H.-E RichterK.L Yung 《Planetary and Space Science》2002,50(9):903-913
For planetary landing missions, the capability to acquire samples of soil and rock is of high importance whenever complex analyses (e.g. isotopic studies) on these materials are to be carried out, or when samples are to be returned to Earth. Not only surface samples are of relevance, but in recent concepts at least for Mars landing missions also subsurface samples are required. Subsurface material on Mars is believed to have been protected from the inferred oxidants at the immediate surface while also being protected from the UV influx. Therefore, there is considerable hope that in subsurface soil samples on Mars, at least organic matter delivered by meteorites may be detected, and possibly also relics of earlier simple microbial life on the planet. Likewise, samples from the inside of Martian surface rocks promise to have been protected from weathering and for the same reason they are important for organic chemistry studies. In this paper, an overview is given of the development and science of two different subsurface sampling devices for the Beagle 2 lander of ESA's Mars Express mission, being a “Mole” subsurface soil sampler and a small rock coring and sampling mechanism. Besides their sampling function, both the Mole and the Corer/Grinder will provide data on physical properties of Martian soils and rock, respectively, through the way they interact with the sampled materials. Details of the Mole and Corer/Grinder design are presented, along with results of recent tests with prototypes in the laboratory on physically analogous sample materials. 相似文献
8.
V. P. Reutov V. V. Chernov A. B. Ezersky P. R. Gromov 《Izvestiya Atmospheric and Oceanic Physics》2012,48(2):185-192
We present the results of laboratory studies of convective structures in a thin (5 mm) ethyl-alcohol layer blown off by airflow
in a wind tunnel. The formation of structures in the working part of the alcoholfilled cuvette are determined by the destabilizing
(inversion-type) temperature profile arising due to the evaporation of liquid. The design of the experimental setup ensures
the unidirectional character of the current in the working part of the cuvette where structures are formed. We singled out
three stages through which structures successively evolve with increasing the wind velocity: polygonal cells (no blowing),
along-flow elongated cells, and along-flow aligned convective roll structures. The profiles of the average and pulsation velocities
in the boundary layer over the cuvette are determined together with the drift flow velocity of the liquid at different transition
stages from convective cells to rolls. The dimensionless flow parameters are estimated and the comparison of the experimental
data with known theoretical results is fulfilled. 相似文献
9.
V. E. Gromov I. S. Pashkovsky E. Yu. Potapova 《Moscow University Geology Bulletin》2009,64(6):376-382
This article is concerned with processing of data in testing for groundwater inflow at the Imeretinsky lowland, the area where
construction of the Olympic infrastructure for Sochi-2014 is planned. Under the complex hydrogeological conditions of this
territory caused by the layered (anisotropic) structure of the stratum and a free-flow filtration regime, interpretation of
pumping tests from imperfect wells gives rise to some difficulties related to the ambiguousness of identification of an analytical
model. For interpretation, an entire spectrum of methods, including hydrodynamic modeling and analytical calculation, were
used. 相似文献
10.
Despirak I. V. Kleimenova N. G. Gromova L. I. Gromov S. V. Malysheva L. M. 《Geomagnetism and Aeronomy》2020,60(3):292-300
Geomagnetism and Aeronomy - The development of two supersubstorms (i.e., very intense substorms with an amplitude of more than 2000 nT) recorded in the main phase of two consecutive strong magnetic... 相似文献