Gravitational waves from relativistic rotational core collapse

Details Gravitational waves from relativistic rotational core collapse Gravitational waves from relativistic rotational core collapse

2001-03-06

arxiv.org/abs/astro-ph/0103088v1

Astrophys.J. 560 (2001) L163-L166

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures

Scientific paper

10.1086/324406

We present results from simulations of axisymmetric relativistic rotational core collapse. The general relativistic hydrodynamic equations are formulated in flux-conservative form and solved using a high-resolution shock-capturing scheme. The Einstein equations are approximated with a conformally flat 3-metric. We use the quadrupole formula to extract waveforms of the gravitational radiation emitted during the collapse. A comparison of our results with those of Newtonian simulations shows that the wave amplitudes agree within 30%. Surprisingly, in some cases, relativistic effects actually diminish the amplitude of the gravitational wave signal. We further find that the parameter range of models suffering multiple coherent bounces due to centrifugal forces is considerably smaller than in Newtonian simulations.

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