Numerical testbed for singularity excision in moving black hole spacetimes

Hwei Jang Yo, Thomas W. Baumgarte, Stuart L. Shapiro

Research output: Contribution to journalArticlepeer-review

Abstract

We evolve a scalar field in a fixed Kerr-Schild background geometry to test simple (3 + 1)-dimensional algorithms for singularity excision. We compare both centered and upwind schemes for handling the shift (advection) terms, as well as different approaches for implementing the excision boundary conditions, for both static and boosted black holes. By first determining the scalar field evolution in a static frame with a (1 + 1)-dimensional code, we obtain the solution to very high precision. This solution then provides a useful testbed for simulations in full (3 +1) dimensions. We show that some algorithms which are stable for non-boosted black holes become unstable when the boost velocity becomes high.

Original languageEnglish (US)
Article number124011
JournalPhysical Review D
Volume64
Issue number12
StatePublished - Dec 15 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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