Rotating Collapse of Stellar Iron Cores in General Relativity

Abstract

We present results from the first 2+1 and 3+1 simulations of the collapse of rotating stellar iron cores in general relativity employing a finite-temperature equation of state and an approximate treatment of deleptonization during collapse. We compare full 3+1 and conformally-flat spacetime evolution methods and find that the conformally-flat treatment is sufficiently accurate for the core-collapse supernova problem. We focus on the gravitational wave (GW) emission from rotating collapse, core bounce, and early postbounce phases. Our results indicate that the GW signature of these phases is much more generic than previously estimated. In addition, we track the growth of a nonaxisymmetric instability of dominant m = 1 character in two of our models that leads to prolonged narrow-band GW emission at ~ 920-930 Hz over several tens of milliseconds.

19 pages, 6 figures, minor corrections and additions; accepted for publication in the Proceedings of the New Frontiers in Numerical Relativity Conference, AEI Golm, Germany, 2006

References in corpus (4)

• Accurate simulations of the dynamical bar-mode instability in full General Relativity
• A New Mechanism for Gravitational Wave Emission in Core-Collapse Supernovae
• Axisymmetric simulations of magnetorotational core collapse: Approximate inclusion of general relativistic effects
• Unexpected Dynamical Instabilities In Differentially Rotating Neutron Stars

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