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  • 1
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    Nonlinear reflection from the surface of neutron stars and features of radio emission from the pulsar in the Crab nebula (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-09-03
    Description: There are no explanations for the high-frequency component of the emission from the pulsar in the Crab nebula, but it may be a manifestation of instability in nonlinear reflection from the star's surface. Radiation from relativistic positrons flying from the magnetosphere to the star and accelerated by the electric field of the polar gap is reflected. The instability involves stimulated scattering on surface waves.
    Print ISSN: 1063-777X
    Electronic ISSN: 1090-6517
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 2
    Electronic Resource
    Electronic Resource
    Theory of weak turbulence of waves on a fluid surface (1974)
    Springer
    Journal of applied mechanics and technical physics 15 (1974), S. 810-817 
    Details
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The nonlinear interaction of waves in a fluid of finite depth is discussed. Forbidden decay processes in the gravitational portion of the spectrum are eliminated from the Hamiltonian by means of a canonical transformation. This provides an opportunity to obtain a kinetic equation which takes into account scattering of capillary waves by gravitational waves, in addition to decays in the subsystem of gravitational waves. The distribution Nk ∼ P1/2h1/4k−4 is obtained for capillary waves in shallow water with constant flow of energy P with respect to the spectrum in the space of the wave numbers k. The interaction of the gravitational and capillary turbulence spectra is discussed. An induced distribution of gravitational waves is found which results from their interaction with capillary waves. It is an increasing function of the wave numbers q in the region bounded by the capillary constant ko, Nq ∼ q9/4 (q 〈 ko). The coupling of spectra in the gravitational and capillary regions and the conversion from slightly turbulent distributions to universal distributions are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00864601
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Formation of universal and diffusion regions of non-linear spectra of relativistic electrons in spatially limited sources (1980)
    Springer
    Astrophysics and space science 71 (1980), S. 265-293 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is demonstrated that in the case of hard injection of relativistic electrons accompanied by the joint action of synchrotron (Compton) losses and energy-dependent spatial diffusion, a spectrum with ‘breaks’ is formed containing universal (with index γ=2) and diffusion regions, both independent of the injection spectrum. The effect from non-linearity of the electron spectrum is considered in averaged electromagnetic spectra for various geometries of sources (sphere, disk, arm). It is shown that a universal region (with index α=0.5) can occur in the radiation spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00639389
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  • 4
    Electronic Resource
    Electronic Resource
    The spectra of radiation and relativistic electrons formed by Compton scattering at non-zero particle fluxes (1978)
    Springer
    Astrophysics and space science 57 (1978), S. 347-370 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The formation of steady-state spectra of radiation or particles by Compton scattering is discussed for the case when the flux from the source is present. Power-law distributions, or those characterized by a power-law asymptotic behaviour, can appear under these conditions. The power indices and normalizations have been found as well as the flux directions for the electron and photon distributions in two cases. The first case is that of differential energy transfer over the electron spectrum (interaction with soft radiation). For the case of integrated transfer, relations have been found between the indices. The possibility of a power-law electron spectrum (with an index γ=2) has been shown for scattering by equilibrium radiation (the black-body background included).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00639329
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  • 5
    Electronic Resource
    Electronic Resource
    Investigation of Shock Wave Dynamics in An Inhomogeneous Solar Atmosphere (1997)
    Springer
    Solar physics 172 (1997), S. 93-101 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The shock front (SF) propagation in the solar atmosphere with a power-law decrease of density is studied in the Kompaneets approximation. It is shown that the SF part moving from the Sun in the radial direction speeds up at the exponent n 〉 3 and slows down at n 〈 3. When passing from the lower corona with n = 6 to the solar wind with n = 2, the acceleration in the front part changes into deceleration. This result allows us to understand the kinematics of the SF obtained from the observational data on type II bursts at low frequencies. Besides, in the region of solar wind, new analytical solutions of the Kompaneets equation (KE) for SF have been obtained. One of them describes SF as an expanding sphere with the center moving from the Sun (plain case). Another solution has been obtained for the case of the inverse near-square law density depending on radius with the singularity at a given levelR∞.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004997513672
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  • 6
    Electronic Resource
    Electronic Resource
    The relation between the velocity and mass distributions. The role of collisionless relaxation processes (1985)
    Springer
    Journal of statistical physics 38 (1985), S. 217-229 
    Details
    ISSN: 1572-9613
    Keywords: Kinetic equations ; collision integral ; symmetry transformations ; power-law spectra ; coalescence ; galaxay clusters ; star clusters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider steady-state mass distributions (mass functions) attained at the nonlinear stage of fragmentation as a result of fragment coalescence. The influence of the fragment velocity distribution on the mass function is discussed. The kinetic equations governing the fragments “quasiparticles” are solved using the group symmetry properties of the collision integral. We have calculated power indices and locations of the breaking points for the mss spectrum (luminosity function) associated with the transition from the collisionless Lynden-Bell type to the Maxwellian distribution, as well as with the predominance of either purely geometric or Newtonian collision cross sections. The power indices found are in a reasonable agreement with the values observed for star or galaxy clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01017859
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  • 7
    Electronic Resource
    Electronic Resource
    Mutual effect of long waves and turbulence on the surface of a liquid (1973)
    Springer
    Journal of applied mechanics and technical physics 14 (1973), S. 81-89 
    Details
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The interaction of a long coherent wave with the turbulence on the surface of a liquid is investigated within the framework of the theory of weak turbulence. A closed system of equations is obtained which consists of the dynamic equation for the coherent wave and equations of kinetic type describing the turbulent subsystem. It is shown that because of the interaction with the turbulent subsystem, coherent waves with wave vectors identical in magnitude but opposite in direction are coupled. The additional attenuation of the coherent wave because of the interaction is estimated; this attenuation may be considerably greater than that caused by molecular viscosity. A change in the spectrum of height correlators of the liquid surface is seen in the presence of a coherent wave.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00850581
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  • 8
    Electronic Resource
    Electronic Resource
    Stationary oscillations of the electron cloud in a cylindrical magnetron (1967)
    Springer
    Radiophysics and quantum electronics 10 (1967), S. 59-65 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01038164
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  • 9
    Electronic Resource
    Electronic Resource
    The application of group theory to an investigation of the removal of degeneracy in a spherical resonator (1971)
    Springer
    Radiophysics and quantum electronics 14 (1971), S. 1464-1470 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033683
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  • 10
    Electronic Resource
    Electronic Resource
    The application of symmetry theory to the study of the splitting of degenerate oscillation modes in the cavity systems of a magnetron (1971)
    Springer
    Radiophysics and quantum electronics 14 (1971), S. 1493-1501 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033687
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