Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published December 6, 2018 | Submitted
Journal Article Open

Orbiting black-hole binaries and apparent horizons in higher dimensions

Abstract

We study gravitational wave emission and the structure and formation of apparent horizons in orbiting black-hole binary systems in higher-dimensional general relativity. For this purpose we present an apparent horizon finder for use in higher dimensional numerical simulations and test the finder's accuracy and consistency in single and binary black-hole spacetimes. The black-hole binaries we model in D  =  6 dimensions complete up to about one orbit before merging or scatter off each other without formation of a common horizon. In agreement with the absence of stable circular geodesic orbits around higher-dimensional black holes, we do not find binaries completing multiple orbits without finetuning of the initial data. All binaries radiate about 0.13%–0.2% of the total mass-energy in gravitational waves, over an order of magnitude below the radiated energy measured for four-dimensional binaries. The low radiative efficiency is accompanied by relatively slow dynamics of the binaries as expected from the more rapid falloff of the binding gravitational force in higher dimensions.

Additional Information

© 2018 IOP Publishing Ltd. Received 17 August 2018, revised 12 October 2018. Accepted for publication 19 October 2018. Published 9 November 2018. We thank Pau Figueras for the Myers–Perry initial data in Kerr–Schild coordinates and Nathan Johnson-McDaniel and Markus Kunesch for very helpful discussions on the topic. We acknowledge financial support provided under the European Union's H2020 ERC Consolidator Grant 'Matter and strong-field gravity: New frontiers in Einstein's theory' grant agreement no. MaGRaTh–646597 funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 690904, the COST Action Grant No. CA16104, from STFC Consolidator Grant No. ST/L000636/1, the SDSC Comet and TACC Stampede2 clusters through NSF-XSEDE Award Nos. PHY-090003, by PRACE for awarding us access to MareNostrum at Barcelona Supercomputing Center (BSC), Spain under Grant No.2016163948, and Cambridge's Cosmos Shared Memory system through BIS Grant No. ST/J005673/1 and STFC Grant Nos. ST/H008586/1, ST/K00333X/1. WGC acknowledges support by a STFC studentship and DW support by a Trinity College Summer Research Fellowship.

Attached Files

Submitted - 1808.05834

Files

Files (695.1 kB)
Name Size Download all
md5:3b2f00b23b1618c73f9b9ab93148f603
695.1 kB Download

Additional details

Created:
August 19, 2023
Modified:
October 19, 2023