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  Accurate Simulations of Binary Black-Hole Mergers in Force-Free Electrodynamics

Alic, D., Moesta, P., Rezzolla, L., Zanotti, O., & Jaramillo, J. L. (2012). Accurate Simulations of Binary Black-Hole Mergers in Force-Free Electrodynamics. Astrophysical Journal, 754: 36. doi:10.1088/0004-637X/754/1/36.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A8AF-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-A8B1-5
Genre: Journal Article

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1204.2226 (Preprint), 3MB
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 Creators:
Alic, Daniela1, Author              
Moesta, Philipp1, Author              
Rezzolla, Luciano1, Author              
Zanotti, Olindo, Author
Jaramillo, Jose Luis1, Author              
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: We provide additional information on our recent study of the electromagnetic emission produced during the inspiral and merger of supermassive black holes when these are immersed in a force-free plasma threaded by a uniform magnetic field. As anticipated in a recent letter, our results show that although a dual-jet structure is present, the associated luminosity is ~ 100 times smaller than the total one, which is predominantly quadrupolar. We here discuss the details of our implementation of the equations in which the force-free condition is not implemented at a discrete level, but rather obtained via a damping scheme which drives the solution to satisfy the correct condition. We show that this is important for a correct and accurate description of the current sheets that can develop in the course of the simulation. We also study in greater detail the three-dimensional charge distribution produced as a consequence of the inspiral and show that during the inspiral it possesses a complex but ordered structure which traces the motion of the two black holes. Finally, we provide quantitative estimates of the scaling of the electromagnetic emission with frequency, with the diffused part having a dependence that is the same as the gravitational-wave one and that scales as L ~ Omega^{10/3-8/3}, while the collimated one scales as L ~ Omega^{5/3-6/3}, thus with a steeper dependence than previously estimated. We discuss the impact of these results on the potential detectability of dual jets from supermassive black holes and the steps necessary for more accurate estimates.

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 Dates: 2012-04-1020122012
 Publication Status: Published in print
 Pages: 17 pages, 8 figures
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 Rev. Method: -
 Identifiers: arXiv: 1204.2226
DOI: 10.1088/0004-637X/754/1/36
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Title: Astrophysical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 754 Sequence Number: 36 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954922828215_2