The Accelerated Expansion of the Universe Challenged by an Effect of the Inhomogeneities. A Review

Abstract

Since its decovery during the late 90's, the dimming of distant SN Ia apparent luminosity has been mostly ascribed to the influence of a mysterious dark energy component. Formulated in a Friedmannian cosmological modelling framework based upon the cosmological ``principle'' hypothesis, this interpretation has given rise to the ``concordance'' model. However, a caveat of such a reasoning is that the cosmological ``principle'' derives from a philosophical Copernican assumption and has never been tested. Furthermore, a weakness of its conclusion, i. e., the existence of a negative-pressure fluid or a cosmological constant, is that it would have profound implications for the current theories of physics. This is why we have proposed a more conservative explanation, ascribing the departure of the observed universe from an Einstein-de Sitter model to the influence of inhomogeneities. This idea has been independently developed by other authors and further enlarged to the reproduction of different cosmological data. We review here the main proposals which have been put forward to deal with this purpose and present some prospects for future developments.

arXiv comment21 pages, minor changes to match the final published version

References in corpus (1)

• Cosmological long wavelength perturbations

Cited by in corpus (20)

• Dark Energy from structure: a status report
• Is the Observable Universe Consistent with the Cosmological Principle?
• Establishing homogeneity of the universe in the shadow of dark energy
• Inhomogeneity effects in Cosmology
• The Cosmic Microwave Background in an Inhomogeneous Universe - why void models of dark energy are only weakly constrained by the CMB
• Dark energy: myths and reality
• Cosmological Bardeen-Cooper-Schrieffer condensate as dark energy
• Luminosity distance and redshift in the Szekeres inhomogeneous cosmological models
• Gravitational entropies in LTB dust models
• Radial asymptotics of Lemaitre-Tolman-Bondi dust models
• Model- and calibration-independent test of cosmic acceleration
• Invariant characterization of the growing and decaying density modes in LTB dust models
• Dark Energy: The Shadowy Reflection of Dark Matter?
• On spatial volume averaging in Lema\^ıtre--Tolman--Bondi dust models. Part I: back reaction, spacial curvature and binding energy
• Dark matter and dark energy proposals: maintaining cosmology as a true science?
• An Inhomogeneous Model Universe Behaving Homogeneously
• On the determination of dark energy
• Void or Dark Energy?
• Modified Averaging Processes in Cosmology and the Structured FRW model
• Phenomenological constraints on Lemaitre-Tolman-Bondi cosmological inhomogeneities from solar system dynamics