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  1. Pubblicazioni

Spherically symmetric cosmological spacetimes with dust and radiation — numerical implementation

Articolo
Data di Pubblicazione:
2013
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.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Woei Chet Lim;Marco Regis;Chris Clarkson
Autori di Ateneo:
REGIS Marco
Link alla scheda completa:
https://iris.unito.it/handle/2318/142854
Pubblicato in:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Journal
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URL

http://arxiv.org/abs/1308.0902
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