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Wir sind gerne für Sie daWhile it seems possible to present a fairly complete uni?ed theory of undistorted polytropes, as attempted in the previous chapter, the theory of distorted polytropes is much more extended and - phisticated, so that I present merely a brief overview of the theories that seem to me most interesting and important. Basically, the methods proposed to study the hydrostatic equilibrium of a distorted self-gravitating mass can be divided into two major groups (Blinnikov 1975): (i) Analytic or semia- lytic methods using a small parameter connected with the distortion of the polytrope. (ii) More or less accurate numerical methods. Lyapunov and later Carleman (see Jardetzky 1958, p. 13) have demonstrated that a sphere is a unique solution to the problem of hydrostatic equilibrium for a ?uid mass at rest in tridimensional space. The problem complicates enormously if the sphere is rotating rigidly or di?erentially in space round an axis, and/or if it is distorted magnetically or tidally. Even for the simplest case of a uniformly rotating ?uid body with constant density not all possible solutions have been found (Zharkov and Trubitsyn 1978, p. 222). The sphere becomes an oblate ?gure, and we have no a priori knowledge of its strati?cation, boundary shape, planes of symmetry, transfer of angular momentum in di?erentially rotating bodies, etc.
Produkteigenschaften
- Artikelnummer: 9781402023507
- Medium: Buch
- ISBN: 978-1-4020-2350-7
- Verlag: Springer
- Erscheinungstermin: 28.07.2004
- Sprache(n): Englisch
- Auflage: 2004. Auflage 2004
- Serie: Astrophysics and Space Science Library
- Produktform: Gebunden
- Gewicht: 1239 g
- Seiten: 724
- Format (B x H x T): 162 x 241 x 48 mm
- Ausgabetyp: Kein, Unbekannt