Using Time Drift of Cosmological Redshifts to find the Mass-Energy Density of the Universe

Details Using Time Drift of Cosmological Redshifts to find the Mass-Energy Density of the Universe Using Time Drift of Cosmological Redshifts to find the Mass-Energy Density of the Universe

2010-09-14

arxiv.org/abs/1009.2783v1

Phys.Rev.D82:123513,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages

Scientific paper

10.1103/PhysRevD.82.123513

In this paper we show that the mass-energy density of the Universe can be fully determined in terms of the cosmological redshifts, their time drifts and angular-diameter distance (observer area distance). Besides providing an indirect measurement of the mass-energy density of the Universe, we show how one can use the time-drift of the cosmological redshifts as a replacement for the mass-energy density element in the minimally required data set to construct an spherically symmetric Lema\^{\i}tre-Tolman-Bondi (LTB) model for the Universe in observational coordinates.

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