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  Shadows of Exact Binary Black Holes

Cunha, P. V. P., Herdeiro, C. A. R., & Rodriguez, M. J. (2018). Shadows of Exact Binary Black Holes. Physical Review D, 98: 044053. doi:10.1103/PhysRevD.98.044053.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-0FE7-A Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E98F-7
Genre: Journal Article

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 Creators:
Cunha, Pedro V. P., Author
Herdeiro, Carlos A. R., Author
Rodriguez, Maria J.1, Author              
Affiliations:
1Gravitation and Black Hole Theory, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_2477691              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: Black hole (BH) shadows in dynamical binary BHs (BBHs) have been produced via ray-tracing techniques on top of expensive fully non-linear numerical relativity simulations. We show that the main features of these shadows are captured by a simple quasi-static resolution of the photon orbits on top of the static double-Schwarzschild family of solutions. Whilst the latter contains a conical singularity between the line separating the two BHs, this produces no major observable effect on the shadows, by virtue of the underlying cylindrical symmetry of the problem. This symmetry is also present in the stationary BBH solution comprising two Kerr BHs separated by a massless strut. We produce images of the shadows of the exact stationary co-rotating (even) and counter-rotating (odd) stationary BBH configurations. This allow us to assess the impact on the binary shadows of the intrinsic spin of the BHs, contrasting it with the effect of the orbital angular momentum.

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 Dates: 2018-05-092018-05-182018
 Publication Status: Published in print
 Pages: 16 pages, 8 figures; v2: references added; videos available here: http://gravitation.web.ua.pt/node/1496
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 Identifiers: arXiv: 1805.03798
URI: http://arxiv.org/abs/1805.03798
DOI: 10.1103/PhysRevD.98.044053
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 98 Sequence Number: 044053 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258