Galactic Evolution
Mostrando 13-17 de 17 artigos, teses e dissertações.
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13. Investigations on the scaling relations of self-gravitating stellar systems / Investigações sobre as relações de escala dos sistemas estelares auto-gravitantes
We aim in this work to collect several numerical and analitical investigations concerning the origin of the scaling relations of the self-gravitating stellar systems. These relations depend on a very small number of independent physical parameters that reduce and confine the observational constraints to a plane in this parameter space, called the ""Fundament
Publicado em: 2001
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14. Investigações sobre as relações de escala dos sistemas estelares auto-gravitantes / Investigations on the scaling relations of self-gravitating stellar systems
Objetivamos neste trabalho reunir algumas investigações de ordem numérica e analítica sobre a origem das relações de escala dos sistemas estelares auto-gravitantes. Estas relações dependem de um número bastante pequeno de parâmetros físicos independentes, que reduzem e confinam os vínculos observacionais a um plano neste espaço de parâmetros, c
Publicado em: 2001
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15. Primordial nucleosynthesis
With the advent of the new extragalactic deuterium observations, Big Bang nucleosynthesis (BBN) is on the verge of undergoing a transformation. In the past, the emphasis has been on demonstrating the concordance of the BBN model with the abundances of the light isotopes extrapolated back to their primordial values by using stellar and galactic evolution
National Academy of Sciences.
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16. Optical evidence for the unification of active galactic nuclei and quasi-stellar objects.
There is a variety of optical evidence for some unification of different types of active galactic nuclei and quasi-stellar objects (QSOs). The case is very strong for the unification of at least some Seyfert galaxies, where polarization data show that the type assigned to the Seyfert galaxy must depend on viewing direction. It has been proposed that Fanaroff
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17. The case for unification.
I investigate the issue of whether the various subclasses of radio-loud galaxies are intrinsically the same but have been classified differently mainly due to their being viewed from different directions. Evidence for the two key elements of this popular version of the "unified scheme (US)," relativistic jets and nuclear tori, is updated. The case for the to