The Final Remnant of Binary Black Hole Mergers: Multipolar Analysis

Details The Final Remnant of Binary Black Hole Mergers: Multipolar Analysis The Final Remnant of Binary Black Hole Mergers: Multipolar Analysis

2009-07-02

arxiv.org/abs/0907.0280v3

Phys.Rev.D80:084012,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 13 figures. Published version. Some references have been added and reordered, and the figures cleaned up.

Scientific paper

10.1103/PhysRevD.80.084012

Methods are presented to define and compute source multipoles of dynamical horizons in numerical relativity codes, extending previous work from the isolated and dynamical horizon formalisms in a manner that allows for the consideration of horizons that are not axisymmetric. These methods are then applied to a binary black hole merger simulation, providing evidence that the final remnant is a Kerr black hole, both through the (spatially) gauge-invariant recovery of the geometry of the apparent horizon, and through a detailed extraction of quasinormal ringing modes directly from the strong-field region.

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