Showcase  Numerical Relativity Media
The Numerical Relativity snapshots
The numerical simulations of black holes, especially of binary black holes, has come of age during the last years. The orbital evolution of the singularities and the production of gravitational waves are routinely simulated for several interesting cases. From these simulations visual animations and pictures are produced.
The focus of the Jena Numerical Relativity Group are binary black hole evolutions with and without spin.
Gallery

Event horizons for the final inspiral, collision and merger of two black holes shown in xyt diagrams. The timeaxis points upwards. Click the picture to see the movie (6.6 MB) or
Click here to see more animations and pictures.
At each instant of time the intersection of the xyplane with a spherical black hole is a circle. Stacking these time slices gives the graphical representation of the event horizon as two tubes that merge as time progresses. For a headon collision, the resulting picture is called the "pair of pants". For orbiting black holes it can be called the "twisted pants".
Pictures Binary black hole merger (variation of color) Binary black hole merger (red on blue), diagonally upwards Binary black hole merger (red on blue), diagonally downwards Binary black hole merger, unequal mass, mass ratio 2:1 

Simulation of 42 black holes starting from rest spelling E=mc2 (2007). Nowadays the numerical methods are stable and efficient so that it has become possible to evolve such systems all the way through the merger. Plotted is the conformal factor.Click the picture for an animation.
Click here to show a short description.
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