Isolated Horizon structures in quasiequilibrium black hole initial data

Details Isolated Horizon structures in quasiequilibrium black hole initial data Isolated Horizon structures in quasiequilibrium black hole initial data

2009-01-12

arxiv.org/abs/0901.1569v2

Phys.Rev.D79:087506,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, no figures. Shortened presentation matching the published version

Scientific paper

10.1103/PhysRevD.79.087506

Isolated horizon conditions enforce the time invariance of both the intrinsic and the extrinsic geometry of a (quasilocal) black hole horizon. Nonexpanding horizons, only requiring the invariance of the intrinsic geometry, have been successfully employed in the (excision) initial data of black holes in instantaneous equilibrium. Here we propose the use of the full isolated horizon structure when solving the elliptic system resulting from the complete set of conformal 3+1 Einstein equations under a quasiequilibrium ansatz prescription. We argue that a set of geometric inner boundary conditions for this extended elliptic system then follows, determining the shape of the excision surface.

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