The luminosity distance-redshift relation is one of the fundamental tools of modern cosmology. We compute the luminosity distance-redshift relation in a perturbed flat matter-dominated Universe, taking into account the presence of cosmological inhomogeneities up to second order in perturbation theory. Cosmological observations implementing the luminosity distance-redshift relation tell us that the Universe is presently undergoing a phase of accelerated expansion. This seems to call for a mysterious Dark Energy component with negative pressure. Our findings suggest that the need of a Dark Energy fluid may be challenged once a realistic inhomogeneous Universe is considered and that an accelerated expansion may be consistent with a matter-dominated Universe.

Effect of inhomogeneities on the luminosity distance-redshift relation: is dark energy necessary in a perturbed universe? / Barausse, E.; Matarrese, S.; Riotto, A.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 71:6(2005), pp. 1-17. [10.1103/PhysRevD.71.063537]

Effect of inhomogeneities on the luminosity distance-redshift relation: is dark energy necessary in a perturbed universe?

Barausse, E.;
2005

Abstract

The luminosity distance-redshift relation is one of the fundamental tools of modern cosmology. We compute the luminosity distance-redshift relation in a perturbed flat matter-dominated Universe, taking into account the presence of cosmological inhomogeneities up to second order in perturbation theory. Cosmological observations implementing the luminosity distance-redshift relation tell us that the Universe is presently undergoing a phase of accelerated expansion. This seems to call for a mysterious Dark Energy component with negative pressure. Our findings suggest that the need of a Dark Energy fluid may be challenged once a realistic inhomogeneous Universe is considered and that an accelerated expansion may be consistent with a matter-dominated Universe.
71
6
1
17
063537,
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.71.063537
https://arxiv.org/abs/astro-ph/0501152v3
Barausse, E.; Matarrese, S.; Riotto, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/89714
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