Bulletin of the American Physical Society
2009 APS April Meeting
Volume 54, Number 4
Saturday–Tuesday, May 2–5, 2009; Denver, Colorado
Session W6: Numerical Simulations of Coalescing Compact Objects: Black Holes and Neutron Stars |
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Sponsoring Units: DCOMP GGR Chair: Manuela Campanelli, Rochester Institute of Technology Room: Governor's Square 16 |
Tuesday, May 5, 2009 10:45AM - 11:21AM |
W6.00001: Numerical Relativity: A critical new tool for astrophysics Invited Speaker: The past few years have seen a renaissance in Numerical Relativity that has transformed the field into a critical tool for studying astrophysical systems. Researchers around the world have made many important new discoveries in the evolution of black-hole systems. In this talk I will describe many of the results that a few years ago seemed impossible to obtain, including unexpectedly large recoil kicks, modeling of the remnant masses and spins, post-Newtonian / NR comparisons, highly-accurate long-term evolutions, explorations of mathematical structure of remnant spacetimes, and N-black-hole merger scenarios. [Preview Abstract] |
Tuesday, May 5, 2009 11:21AM - 11:57AM |
W6.00002: General Relativistic Simulations of Black Hole-Neutron Star Mergers: Status and Applications Invited Speaker: Black hole-neutron star (BHNS) mergers are expected to be among the leading sources of gravitational waves observable by ground-based detectors, and may be progenitors of short-hard gamma-ray bursts (SGRBs). BHNS merger simulations in full general relativity represent the ultimate challenge of compact binary evolution: they involve all of the complications of relativistic hydrodynamics, including shocks, in a strong dynamical field, together with all of the hurdles of evolving moving black holes without encountering their spacetime singularities. In this talk, I will review the numerical techniques used by various groups to simulate BHNS binaries through inspiral, merger and ringdown. I will discuss the effects of binary mass ratio, black-hole spin, and neutron star compaction on the final outcomes of the mergers, and the implications on the gravitational wave and SGRB physics. Finally, I will discuss the possibilty of simultaneous detections of gravitational waves and SGRBs, and what we could learn from these detections. [Preview Abstract] |
Tuesday, May 5, 2009 11:57AM - 12:33PM |
W6.00003: Modelling the Inspiral and Merger of Binary Neutron Stars Invited Speaker: Investigating the final evolution of neutron stars binaries promises to be particularly rewarding. These systems are in fact excellent sources of gravitational waves, they are thought to behind the powerful engines powering short gamma-ray bursts, and they can unveil the behaviour of matter at extreme densities and temperatures. I will review the present understanding in the modelling the inspiral and merger of binary neutron stars in full general relativity, underlining the considerable recent progress, but also highlighting the potential pitfalls that can be encountered when studying these systems. [Preview Abstract] |
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