Relativistic Hydrodynamic Evolutions with Black Hole Excision

Details Relativistic Hydrodynamic Evolutions with Black Hole Excision Relativistic Hydrodynamic Evolutions with Black Hole Excision

2004-01-16

arxiv.org/abs/gr-qc/0401076v1

Phys.Rev. D69 (2004) 104016

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 14 figures, submitted to PRD

Scientific paper

10.1103/PhysRevD.69.104016

We present a numerical code designed to study astrophysical phenomena involving dynamical spacetimes containing black holes in the presence of relativistic hydrodynamic matter. We present evolutions of the collapse of a fluid star from the onset of collapse to the settling of the resulting black hole to a final stationary state. In order to evolve stably after the black hole forms, we excise a region inside the hole before a singularity is encountered. This excision region is introduced after the appearance of an apparent horizon, but while a significant amount of matter remains outside the hole. We test our code by evolving accurately a vacuum Schwarzschild black hole, a relativistic Bondi accretion flow onto a black hole, Oppenheimer-Snyder dust collapse, and the collapse of nonrotating and rotating stars. These systems are tracked reliably for hundreds of M following excision, where M is the mass of the black hole. We perform these tests both in axisymmetry and in full 3+1 dimensions. We then apply our code to study the effect of the stellar spin parameter J/M^2 on the final outcome of gravitational collapse of rapidly rotating n = 1 polytropes. We find that a black hole forms only if J/M^2<1, in agreement with previous simulations. When J/M^2>1, the collapsing star forms a torus which fragments into nonaxisymmetric clumps, capable of generating appreciable ``splash'' gravitational radiation.

Affiliated with

Also associated with

No associations

Rating

Relativistic Hydrodynamic Evolutions with Black Hole Excision does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Relativistic Hydrodynamic Evolutions with Black Hole Excision, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic Hydrodynamic Evolutions with Black Hole Excision will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-84403