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Black-hole horizons as probes of black-hole dynamics I: post-merger recoil in head-on collisions

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons26311

Jaramillo,  Jose Luis
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons4338

Moesta,  Philipp
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons20670

Rezzolla,  Luciano
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Volltexte (frei zugänglich)

1108.0060
(Preprint), 2MB

PRD85_084030.pdf
(beliebiger Volltext), 2MB

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Zitation

Jaramillo, J. L., Macedo, R. P., Moesta, P., & Rezzolla, L. (2012). Black-hole horizons as probes of black-hole dynamics I: post-merger recoil in head-on collisions. Physical Review D, 85: 084030. doi:10.1103/PhysRevD.85.084030.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-EEE4-B
Zusammenfassung
The understanding of strong-field dynamics near black-hole horizons is a long-standing and challenging prob- lem in general relativity. Recent advances in numerical relativity and in the geometric characterization of black- hole horizons open new avenues into the problem. In this first paper in a series of two, we focus on the analysis of the recoil occurring in the merger of binary black holes, extending the analysis initiated in [1] with Robinson- Trautman spacetimes. More specifically, we probe spacetime dynamics through the correlation of quantities defined at the black-hole horizon and at null infinity. The geometry of these hypersurfaces responds to bulk gravitational fields acting as test screens in a scattering perspective of spacetime dynamics. Within a 3 + 1 approach we build an effective-curvature vector from the intrinsic geometry of dynamical-horizon sections and correlate its evolution with the flux of Bondi linear momentum at large distances. We employ this setup to study numerically the head-on collision of nonspinning black holes and demonstrate its validity to track the qualita- tive aspects of recoil dynamics at infinity. We also make contact with the suggestion that the antikick can be described in terms of a "slowness parameter" and how this can be computed from the local properties of the horizon. In a companion paper [2] we will further elaborate on the geometric aspects of this approach and on its relation with other approaches to characterize dynamical properties of black-hole horizons.