Buracos negros em universos brana com constante cosmológica / Black holes in brane worlds with cosmological constant
AUTOR(ES)
Juliano César Silva Neves
DATA DE PUBLICAÇÃO
2008
RESUMO
We found classes of static and spherically symmetric black hole solutions on the brane for a vacuum configuration, non-null cosmological constant, embedded into a 5-dimensional asymptotically anti-de Sitter bulk. In the asymptotically de Sitter case, the only solution obtained was the extreme Schwarzschild-de Sitter geometry. In the asymptotically anti-de Sitter case, a class of solutions was obtained where a particular geometry is fixed by a constant, C. We studied the behaviour of these solutions near and far from the horizon. Next, we studied the time evolution of a scalar field outside the black hole. For the effective potential as function of tortoise coordinate, the analytical results near the horizon agree with numerical calculations. The scalar field decays with time and the particular form of decay depends of the value for C. Thus, all solutions in the obtained class are stable.
ASSUNTO(S)
dimensões extras extra dimensions general relativity buracos negros black holes relatividade geral
