Stellar Stability
Mostrando 1-5 de 5 artigos, teses e dissertações.
-
1. Radial oscillations of quark stars: effect of color superconductivity / Oscilações radiais de estrelas de quarks: efeito da superconditividade de cor
The study of radial oscillations of compact stars offers valuable information about their structural stability. These oscillations are also important because they can be observed in the microstructure of the emission prole of certain pulsars and because they can excite the non-radial modes which give rise to gravitational waves. In this work we investigate t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2009
-
2. Sistemas eletricamente carregados em relatividade geral: equilíbrio e colapso / Electrically charged systems in general relativity: equilibrium and colapse
No presente trabalho estuda-se o equilíbrio hidrostático e o colapso gravitacional de estrelas com carga elétrica para três tipos diferentes de simetria: esférica, plana e hiperbólica, em um espaço-tempo d-dimensional. Inicialmente revisam-se brevemente os conceitos fundamentais da Relatividade Geral e apresentam-se as equaçõoes principais a serem u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/08/2009
-
3. "Dusty Plasmas: stellar winds and the interstellar medium" / "Plasmas empoeirados: ventos estelares e o meio interestelar"
In this work, we firstly discuss the propagation of Alfvén waves in dusty plasmas found in several astrophysical environments. The wave dispersion relation is modified giving rise to new damping mechanisms. There are in the literature observational data indicating the presence of dust near the surface of cool giant and supergiant stars. We developed a stell
Publicado em: 2005
-
4. Stability in dynamical astronomy*
Hill's concept of stability is generalized and its relation to bifurcation theory is shown. A quantitative measure of stability is introduced that allows the comparison of the stability of different astronomical systems. Theoretical stability limits for triple stellar systems, for planetary systems, and for satellite systems are established. The measure of s
-
5. ON THE STABILITY OF GASEOUS STELLAR STRUCTURES