Long term black hole evolution with the BSSN system by pseudospectral methods

Understand

We present long term evolutions of a single black hole of mass $M$ with the BSSN system using pseudospectral methods.

• For our simulations we use the SGRID code where the BSSN system is implemented in its standard second order in space form.
• Previously we found that such simulations are quite unstable.
• The main goal of this paper is to present two improvements which now allow us to evolve for longer times.