Polyachenko V L (16 results)
Physics of Gravitating Systems II : Nonlinear Collective Processes: Nonlinear Waves, Solitons, Collisionless Shocks, Turbulence. Astrophysical Applications
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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Physics of Gravitating Systems I : Equilibrium and Stability
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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Physics of Gravitating Systems II : Nonlinear Collective Processes: Nonlinear Waves, Solitons, Collisionless Shocks, Turbulence. Astrophysical Applications
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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Physics of Gravitating Systems II : Nonlinear Collective Processes: Nonlinear Waves, Solitons, Collisionless Shocks, Turbulence. Astrophysical Applications
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
- Softcover
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Physics of Gravitating Systems I : Equilibrium and Stability
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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Physics of Gravitating Systems II : Nonlinear Collective Processes: Nonlinear Waves, Solitons, Collisionless Shocks, Turbulence. Astrophysical Applications
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
- Softcover
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Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - (Volume II).- Non-Jeans Instabilities of Gravitating Systems.- VI Non-Jeans Instabilities of Gravitating Systems.- ¿ 1. Beam Instability of a Gravitating Medium.- 1.1. Theorem of a Number of Instabilities of the Heterogeneous System with Homogeneou…s Flows.- 1.2. Expression for the Growth Rate of the Kinetic Beam Instability in the Case of a Beam of Small Density (for an Arbitrary Distribution Function).- 1.3. Beam with a Step Function Distribution.- 1.4. Hydrodynamical Beam Instability. Excitation of the Rotational Branch.- 1.5. Stabilizing Effect of the Interaction of Gravitating Cylinders and Disks.- 1.6. Instability of Rotating Inhomogeneous Cylinders with Oppositely Directed Beams of Equal Density.- ¿ 2. Gradient Instabilities of a Gravitating Medium.- 2.1. Cylinder of Constant Density with Radius-Dependent Temperature. Hydrodynamical Instability.- 2.2. Cylinder of Constant Density with a Temperature Jump. Kinetic Instability.- 2.3. Cylinder with Inhomogeneous Density and Temperature.- ¿ 3. Hydrodynamical Instabilities of a Gravitating Medium with a Growth Rate Much Greater than that of Jeans.- 3.1. Hydrodynamical Instabilities in the Model of a Flat Parallel Flow.- 3.2. Hydrodynamical Instabilities of a Gravitating Cylinder.- ¿4. General Treatment of Kinetic Instabilities.- 4.1. Beam Effects in the Heterogeneous Model of a Galaxy.- 4.2. Influence of a ¿Black Hole¿ at the Center of a Spherical System on the Resonance Interactions Between Stars and Waves.- 4.3. Beam Instability in the Models of a Cylinder and a Flat Layer.- VII Problems of Nonlinear Theory.- ¿ 1. Nonlinear Stability Theory of a Rotating, Gravitating Disk.- 1.1. Nonlinear Waves and Solitons in a Hydrodynamical Model of an Infinitely Thin Disk with Plane Pressure.- 1.2. Nonlinear Waves in a Gaseous Disk.- 1.3. Nonlinear Waves and Solitons in a Stellar Disk.- 1.4. Explosive Instability.- 1.5. Remarks on the Decay Processes.- 1.6. Nonlinear Waves in a Viscous Medium.- ¿ 2. Nonlinear Interaction of a Monochromatic Wave with Particles in Gravitating Systems.- 2.1. Nonlinear Dynamics of the Beam Instability in a Cylindrical Model.- 2.2. Nonlinear Saturation of the Instability at the Corotation Radiusin the Disk.- ¿ 3. Nonlinear Theory of Gravitational Instability of a Uniform Expanding Medium.- ¿ 4. Foundations of Turbulence Theory.- 4.1. Hamiltonian Formalism for the Hydrodynamical Model of a Gravitating Medium.- 4.2. Three-Wave Interaction.- 4.3. Four-Wave Interaction.- ¿5. Concluding Remarks.- 5.1. When Can an Unstable Gravitating Disk be Regarded as an Infinitesimally Thin One .- 5.2. On Future Soliton Theory of Spiral Structure.- Problems.- II Astrophysical Applications.- VIII General Remarks.- ¿ 1. Oort¿s Antievolutionary Hypothesis.- ¿ 2. Is There a Relationship Between the Rotational Momentum of an Elliptical Galaxy and the Degree of Oblateness .- ¿ 3. General Principles of the Construction of Models of Spherically Symmetric Systems.- ¿ 4. Lynden-Bell¿s Collisionless Relaxation.- ¿ 5. Estimates of ¿Collisionlessness¿ of Particles in Different Real Systems.- IX Spherical Systems.- ¿ 1. A Brief Description of Observational Data.- 1.1. Globular Star Clusters.- 1.2. Spherical Galaxies.- 1.3. Compact Galactic Clusters.- ¿ 2. Classification of Unstable Modes in Scales.- ¿ 3. Universal Criterion of the Instability.- ¿ 4. Specificity of the Effects of Small-Scale and Large-Scale Perturbations on the System¿s Evolution.- ¿ 5. Results of Numerical Experiments for Systems with Parameters Providing Strong Supercriticality.- ¿ 6. Example of Strongly Unstable Model.- ¿ 7. Can Lynden-Bell¿s Intermixing Mechanism Be Observed Against a Background of Strong Instability .- ¿ 8. Is the ¿Unstable¿ Distribution of Stellar Density Really Unstable (in the Hydrodynamical Sense) in the Neighborhood of a ¿Black Hole¿ .- X Ellipsoidal Systems.- ¿ 1. Objects Under Study.- ¿ 2. Elliptical Galaxies.- 2.1. Why Are Elliptical Galaxies More Oblate than E7 Absent .- 2.2. Comparison of the Observed Oblatenesses of S- and SO-Galaxies with the Oblateness of E-Galaxies.- 2.3. Two Possible Solutions of the Problem.- 2.4. The Boundary of the Anisotropic (Fire-Hose) Instability Determines the Critical Value of Oblateness.- 2.5. Universal Criterion of Instability.- ¿3. SB-Galaxies.- 3.1. The Main Problem.- 3.2. Detection in NGC 4027 of Counterflows as Predicted by Freeman.- 3.3. Stability of Freeman Models of SB-Galaxies with Observed Oblateness.- XI Disk-like Systems. Spiral Structure.- ¿ 1. Different Points of View on the Nature of Spiral Structure.- ¿ 2. Resonant Interaction of the Spiral Wave with Stars of the Galaxy.- 2.1. Derivation of Expressions for the Angular Momentum and Energy of the Spiral Wave.- 2.2. Physical Mechanisms of Energy and Angular Momentum Exchange Between the Spiral Waves and the Resonant Stars.- ¿ 3. The Linear Theory of Stationary Density Waves.- 3.1. The Primary Idea of Lin and Shu of the Stationary Density Waves.- 3.2. The Spiral Galaxy as an Infinite System of Harmonic Oscillators.- 3.3. On ¿Two-Armness¿ of the Spiral Structure.- 3.4. The Main Difficulties of the Stationary Wave Theory of Lin and Shu.- ¿4. Linear Theory of Growing Density Waves.- 4.1. Spiral Structure as the Most Unstable Mode.- 4.2. Gravitational Instability at the Periphery of Galaxies.- 4.3. Waves of Negative Energy Generated Near the Corotation Circle and Absorbed at the Inner Lindblad Resonance¿Lynden-BellKalnaj¿s Picture of Spiral Pattern Maintenance.- 4.4. Kelvin¿Helmholz Instability and Flute-like Instability in the Near-Nucleus Region of the Galaxy as Possible Generators of Spiral Structure.- 4.5. The ¿Trailing¿ Character of Spiral Arms.- ¿ 5. Comparison of the Lin¿Shu Theory with Observations.- 5. 1 The Galaxy.- 5.2. M33, M51, M81.- ¿ 6. Experimental Simulation of Spiral Structure Generation.- 6. 1 In a Rotating Laboratory Plasma.- 6.2. In Numerical Experiment.- ¿ 7. The Hypothesis of the Origin of S.
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Taschenbuch. Condition: Neu. Druck auf Anfrage Neuware - Printed after ordering - It would seem that any specialist in plasma physics studying a medium in which the interaction between particles is as distance-dependent as the inter action between stars and other gravitating masses would assert that the role of collective effect…s in the dynamics of gravitating systems must be decisive. However, among astronomers this point of view has been recog nized only very recently. So, comparatively recently, serious consideration has been devoted to theories of galactic spiral structure in which the dominant role is played by the orbital properties of individual stars rather than collec tive effects. In this connection we would like to draw the reader's attention to a difference in the scientific traditions of plasma physicists and astrono mers, whereby the former have explained the delay of the onset of controlled thermonuclear fusion by the 'intrigues' of collective processes in the plasma, while many a generation of astronomers were calculating star motions, solar andlunar eclipses, and a number of other fine effects for many years ahead by making excellent use of only the laws of Newtonian mechanics. Therefore, for an astronomer, it is perhaps not easy to agree with the fact that the evolution of stellar systems is controlled mainly by collective effects, and the habitual methods of theoretical mechanics III astronomy must make way for the method of self-consistent fields.
Physics of Gravitating Systems I : Equilibrium and Stability
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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Physics of Gravitating Systems I : Equilibrium and Stability
Fridman, A. M.; Polyachenko, V. L.; Aries, A. B. (TRN); Poliakoff, I. N. (TRN)
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