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Event: 'Numerical Evolution Of Spacetimes (Henrique Oliveira, Universidade Estadual Do Rio De Janeiro)'

CENTRA Seminars
Date: Friday, December 17, 2010 At 02:30 PM
Duration: 1 Hour


 We present here some results from the numerical evolution of
spherically symmetric and axisymmetric spacetimes. Two basic aspects
were common in the cases we have treated: first, the field equations
are in the characteristic formulation, and second, we have employed
the spectral methods to solve the numerically the field equations. In
the spherical case black holes are produced as the result of the
collapse of scalar fields. The whole spectrum of black hole masses
which ranges from infinitesimal to large values are obtained after
varying the amplitude of the initial scalar field distribution. Then,
we have found strong numerical evidence that this spectrum is
described by a nonextensive distribution law. Concerning axisymmetric
spacetimes we have integrated the field equations of Robinson-Trautman
space times with a new and efficient code. We have applied the code to
describe in a simple scenario the non-frontal collision of two black
holes. Finally, a more realistic framework represented by the field
equations of the Bondi problem were considered.


Place and time:

Physics Department meeting room, 2nd floor

17 Dec 2010 - 14:30

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