SÉMINAIRE DU GRECO
"Black Holes Surrounded by Uniformly Rotating Rings" |
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Marcus Ansorg |
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Highly accurate numerical solutions to the problem of Black Holes surrounded by uniformly rotating rings in axially symmetric, stationary spacetimes are presented. The numerical methods developed to handle the problem are discussed in some detail. Related Newtonian problems are described and numerical results provided, which show that configurations can reach an inner mass-shedding limit as the mass of the central object increases. Exemplary results for the full relativistic problem for rings of constant density are given and the deformation of the event horizon due to the presence of the ring is demonstrated. Finally, we provide an exemplary sequence of systems for which the angular momentum of the central Black Hole divided by the square of its mass exceeds one drastically. |
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mardi 22 novembre 2005 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
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