Cosmological Tests for a Linear Coasting Cosmology

Abstract

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.

modification in the section 1 and 4

References in corpus (4)

• The 2dF Galaxy Redshift Survey: The Number and Luminosity Density of Galaxies
• The Hubble Constant and the Expansion Age of the Universe
• Linear Coasting in Cosmology and SNe Ia
• The Dependence of the Galaxy Luminosity Function on Environment

Cited by in corpus (27)

• An improved model-independent assessment of the late-time cosmic expansion
• Observational constraints on Hubble constant and deceleration parameter in power-law cosmology
• Strong evidence for an accelerating universe
• Constraints on cosmological parameters in power-law cosmology
• Cosmological Constraints on a Power Law Universe
• Age of High Redshift Objects - a Litmus Test for the Dark Energy Models
• Robust model comparison disfavors power law cosmology
• Unified dark fluid in Brans-Dicke theory
• Testing power-law cosmology with galaxy clusters
• Model Comparison of $\Lambda$CDM vs $R_h=ct$ using Cosmic Chronometers
• Non-minimal derivative coupling gravity in cosmology
• The angular size - redshift relation in power-law cosmologies
• Interacting cosmic fluids in power-law Friedmann-Robertson-Walker cosmological models
• Observational constraints on phantom power-law cosmology
• Primordial Nucleosynthesis in the Rh = ct cosmology: Pouring cold water on the Simmering Universe
• Quintessential power-law cosmology: dark energy equation of state
• Torsional dark energy in quadratic gauge gravity
• Cosmological constraints from low-redshift data
• Theory of gravity admitting arbitrary choice of the energy density reference level
• Constraints on Lepton Asymmetry from Nucleosynthesis in a Linearly Coasting Cosmology
• Scalar field power-law cosmology with spatial curvature and dark energy-dark matter interaction
• Constraints on power law cosmology from cosmic chronometer, standard ruler, and standard candle data
• Reference level of the vacuum energy density of the Universe and astrophysical data
• Tachyonic (phantom) power-law cosmology
• Cosmic evolution in the background of non-minimal coupling in $f(R,T,R_{\mu \nu }{T}^{\mu \nu })$ Gravity
• Evolving Maximally Symmetric Spacetime Bubbles from Spontaneous Z_2-Violation at Electroweak Symmetry Breaking Scale
• Testing Linearly Coasting Cosmology by Strong Lensing System and Pantheon+ Data