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  Spherically symmetric cosmological spacetimes with dust and radiation - numerical implementation

Lim, W. C., Regis, M., & Clarkson, C. (2013). Spherically symmetric cosmological spacetimes with dust and radiation - numerical implementation. Journal of Cosmology and Astroparticles Physics, 013(10): 010. doi:10.1088/1475-7516/2013/10/010.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-11DC-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-11DD-7
Genre: Journal Article

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 Creators:
Lim, Woei Chet1, Author              
Regis, Marco, Author
Clarkson, Chris, Author
Affiliations:
1Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24012              

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO,General Relativity and Quantum Cosmology, gr-qc
 Abstract: We present new numerical cosmological solutions of the Einstein Field Equations. The spacetime is spherically symmetric with a source of dust and radiation approximated as a perfect fluid. The dust and radiation are necessarily non-comoving due to the inhomogeneity of the spacetime. Such a model can be used to investigate non-linear general relativistic effects present during decoupling or big-bang nucleosynthesis, as well as for investigating void models of dark energy with isocurvature degrees of freedom. We describe the full evolution of the spacetime as well as the redshift and luminosity distance for a central observer. After demonstrating accuracy of the code, we consider a few example models, and demonstrate the sensitivity of the late time model to the degree of inhomogeneity of the initial radiation contrast.

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 Dates: 2013-08-052013
 Publication Status: Published in print
 Pages: 12 pages, 5 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1308.0902
DOI: 10.1088/1475-7516/2013/10/010
 Degree: -

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Title: Journal of Cosmology and Astroparticles Physics
  Other : J. Cosmol. Astropart. Phys.
Source Genre: Journal
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Publ. Info: Bristol, England : Institute of Physics Pub.
Pages: - Volume / Issue: 013 (10) Sequence Number: 010 Start / End Page: - Identifier: ISSN: 1475-7516
CoNE: /journals/resource/111055183238000