Cosmological Tests for a Linear Coasting Cosmology

Details Cosmological Tests for a Linear Coasting Cosmology Cosmological Tests for a Linear Coasting Cosmology

2002-04-09

arxiv.org/abs/astro-ph/0204150v3

Phys.Lett. B548 (2002) 12-18

Astronomy and Astrophysics

Astrophysics

modification in the section 1 and 4

Scientific paper

10.1016/S0370-2693(02)02814-9

A strictly linear evolution of the scale factor is a characteristic feature in several classes of alternative gravity theories. In this article we investigate the overall viability of an open linear coasting cosmological model. We report that this model is consistent with gravitational lensing statistics (within $1\sigma$) and accomodates old high-redshift galaxies. We finally conclude that such a linear coasting, $\a(t) = t$, is not ruled out on basis of these observational tests.

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