The LEO code [134] developed by Gómez et al. has been applied to the characteristic evolution of the
coupled Einstein–Klein–Gordon fields, using the cubed-sphere coordinates. The long term plan is
to simulate a boson star orbiting a black hole. In simulations of a scalar pulse incident on a
Schwarzschild black hole, they find the interesting result that scalar energy flow into the black hole
reaches a maximum at spherical harmonic index
, and then decreases for larger
due
to the centrifugal barrier preventing the harmonics from effective penetration. The efficient
parallelization allows them to perform large simulations with resolution never achieved before.
Characteristic evolution of such systems of astrophysical interest have been limited in the past by
resolution. They note that at the finest resolution considered in [55
], it would take 1.5 months on
the fastest current (single) processor to track a star in close orbit around a black hole. This is
so, even though the grid in question is only
points, which is moderate by today’s
standards.
http://www.livingreviews.org/lrr-2012-2 |
Living Rev. Relativity 15, (2012), 2
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