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Black hole lattices under the microscope
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Number of Authors: 22018 (English)In: Classical and quantum gravity, ISSN 0264-9381, E-ISSN 1361-6382, Vol. 35, no 14, article id 145004Article in journal (Refereed) Published
Abstract [en]

It is known how to choose initial data for Einstein's equations describing an arbitrary number of black holes at a moment of time symmetry. This idea has been used to give insight into the cosmological averaging problem. We study the local curvature of the initial data space, for configurations of 8, 120, or 600 black holes obtained by choosing points either regularly or randomly on a 3-sphere. We conclude that the asymptotic regions are remarkably close to that of Schwarzschild, while the region in between shows interesting behaviour. The cosmological back reaction as defined in the recent literature is actually a bit smaller for the random configurations.

Place, publisher, year, edition, pages
2018. Vol. 35, no 14, article id 145004
Keywords [en]
exact solutions, initial data, cosmology
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-158330DOI: 10.1088/1361-6382/aac7e0ISI: 000435675500002OAI: oai:DiVA.org:su-158330DiVA, id: diva2:1237379
Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-08-08Bibliographically approved

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Bengtsson, IngemarGalstyan, Irina
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