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Inhomogeneous cosmology and backreaction: Current status and future prospects

Bolejko, K ORCID: 0000-0001-7402-3836 and Korzynski, M 2017 , 'Inhomogeneous cosmology and backreaction: Current status and future prospects' , International Journal of Modern Physics D, vol. 26, no. 6 , doi: https://doi.org/10.1142/S0218271817300117.

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Abstract

Astronomical observations reveal hierarchical structures in the universe, from galaxies, groups of galaxies, clusters and superclusters, to filaments and voids. On the largest scales, it seems that some kind of statistical homogeneity can be observed. As a result, modern cosmological models are based on spatially homogeneous and isotropic solutions of the Einstein equations, and the evolution of the universe is approximated by the Friedmann equations. In parallel to standard homogeneous cosmology, the field of inhomogeneous cosmology and backreaction is being developed. This field investigates whether small scale inhomogeneities via nonlinear effects can backreact and alter the properties of the universe on its largest scales, leading to a non-Friedmannian evolution. This paper presents the current status of inhomogeneous cosmology and backreaction. It also discusses future prospects of the field of inhomogeneous cosmology, which is based on a survey of 50 academics working in the field of inhomogeneous cosmology.

Item Type: Article
Authors/Creators:Bolejko, K and Korzynski, M
Keywords: Inhomogeneous cosmology, backreaction, coarse-graining, numerical relativity, gravitation, cosmology, astrophysics, large scale structure of the Universe, particle dark matter
Journal or Publication Title: International Journal of Modern Physics D
Publisher: World Scientific Publ Co Pte Ltd
ISSN: 0218-2718
DOI / ID Number: https://doi.org/10.1142/S0218271817300117
Copyright Information:

Preprint of an article published in International journal of modern physics D, 26(1), 2017, 1730011, DOI: 10.1142/S0218271817300117 © copyright World Scientific Publishing Company https://www.worldscientific.com/worldscinet/ijmpd

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