1 - 6 of 6 articles
Abstract The paper is devoted to studying the cosmic X-ray background (CXB) of the Universe in the energy range 1–100 keV and to the prospects for its investigation by means of the projected MVN (Monitor Vsego Neba) experiment. The nature of the CXB and its use for studying the cosmological...
Abstract Results of a fractal analysis of the X-ray light curves from accreting black holes in low-mass binary systems are presented for the object GX 339-4 as an example. The fractal dimension of the light curves is shown to be strongly dependent on the presence of quasi-periodic oscillations...
Abstract We present the results of our spectroscopic studies of the nebula NGC 6857 located in a region of current star formation. Data on the surface brightness distribution in the central region of the nebula (∼60″ × 60″) in the Hα, Hβ, [OIII], 5007 Å, [N II], 6548, 6583 Å, [S II], 6717, 6731...
Abstract A method for a kinematic analysis of stellar radial velocities using spherical harmonics is proposed. This approach does not depend on the specific kinematic model and allows both low-frequency and high-frequency kinematic radial velocity components to be analyzed. The possible...
Abstract An overview of the currently available methods for finding the unstable modes of a stellar disk within the framework of linear perturbation theory is given. The galaxy models with gradually rising and flat rotation curves are used as examples to show the existence of various kinds of...
Abstract Lately, more and more exoplanets are being discovered and the number is expected to increase thanks to the excellent programs dedicated to this task. Thus it is important to study the dynamical behavior of planetary systems. Among all the problems that may be considered, we are...
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