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Your search keyword '"Prokhorov, Mikhail E."' showing total 6 results
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6 results on '"Prokhorov, Mikhail E."'

1. The Multicolor 'Lyra' Photometric System for Variable stars and Halo Studies

Author

Mironov, Alexey V., Zakharov, Andrey I., Prokhorov, Mikhail E., Nikolaev, Feodor N., and Tuchin, Maxim N.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The space photometric project "Lyra" is developed now in Russia.The project purpose is determination of the photometric information and coordinates of the natural and artificial space objects, from the brightest ones to 16^m in visual lights. It is supposed to obtain the data for about 40-400 million objects from board of International Space Station, using an astronomical telescope with diameter of the main mirror of 0.5 m. The observations will be carried out in a scanning mode. Photometry will be obtained in 10 spectral bands. The expected uncertainty of magnitudes for objects of 16^m in the V-band is 0.001^m. The main results of experiment should become: 1) creation of spatial model of the Galaxy on distances to 3 kpc from the Sun; 2) specification of physical parameters of stars and models of star evolution; 3) discovering of a huge number (to several millions) of variable stars and determination of their variability parameters. The central wavelengths of the 10 bands of "Lyra" photometric system will be at 195, 218, 270, 350, 440, 550, 700, 825, 930 and 1000 nm. It is shown that combinations of various colour indices will allow to determine confidently both effective temperature and metallicity of stars. The presence of a 218 nm band allows to determine confidently interstellar extinction on stars of O-F spectral classes. The photometric system will make it possible to separate halo stars from disk stars and to define physical parameters of their atmospheres., Comment: 7 pages, 5 Postscript figures, uses psfig.sty and vshalo.sty

Published
2010

6. Periodic Solutions of Nonlinear Relative Motion Satellites.

Author

Pal, Ashok Kumar, Abouelmagd, Elbaz I., García Guirao, Juan Luis, Brzeziński, Dariusz W., Oks, Eugene, and Prokhorov, Mikhail E.

Subjects
RELATIVE motion, EULER method, NUMERICAL integration, ANALYTICAL solutions, ORBITS of artificial satellites
Abstract

The relative motion of an outline of the rendezvous problem has been studied by assuming that the chief satellite is in circular symmetric orbits. The legitimacy of perturbation techniques and nonlinear relative motion are investigated. The deputy satellite equations of motion with respect to the fixed references at the center of the chief satellite are nonlinear in the general case. We found the periodic solutions of the linear relative motion satellite and for the nonlinear relative motion satellite using the Lindstedt–Poincaré technique. Comparisons among the analytical solutions of linear and nonlinear motions and the obtained solution by the numerical integration of the explicit Euler method for both motions are investigated. We demonstrate that both analytical and numerical solutions of linear motion are symmetric periodic. However, the solutions of nonlinear motion obtained by the Lindstedt–Poincaré technique are periodic and the numerical solutions obtained by integration by using explicit Euler method are non-periodic. Thus, the Lindstedt–Poincaré technique is recommended for designing the periodic solutions. Furthermore, a comparison between linear and nonlinear analytical solutions of relative motion is investigated graphically. [ABSTRACT FROM AUTHOR]

Published
2021
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