Observational Constraints on Modified Chaplygin Gas from Cosmic Growth

Abstract

We investigate the linear growth function for the large scale structures of the universe considering modified Chaplygin gas as dark energy. Taking into account observational growth data for a given range of redshift from the Wiggle-Z measurements and rms mass fluctuations from Ly-$\alpha$ measurements we numerically analyze cosmological models to constrain the parameters of the MCG. The observational data of Hubble parameter with redshift ($Z$) is also considered. The Wang-Steinhardt ansatz for growth index $\gamma$ and growth function $f$ (defined as $f={\Omega }_m^{\gamma }(a)$) are considered for the numerical analysis. The best-fit values of the equation of state parameters obtained here is employed to study the growth function $(f)$, growth index ($\gamma$) and state parameter ($\omega$) with redshift $z$. We note that MCG satisfactorily accommodates an accelerating phase followed by a matter dominated universe.

17 pages, 3 figures, 7 tables

References in corpus (18)

• Cosmological Constraints from the SDSS Luminous Red Galaxies
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• A Parameterized Post-Friedmann Framework for Modified Gravity
• Measuring the dark side (with weak lensing)
• Large Scale Structure as a Probe of Gravitational Slip
• Confirmation of general relativity on large scales from weak lensing and galaxy velocities
• Observational Tests of Modified Gravity
• The 2dF-SDSS LRG and QSO Survey: QSO clustering and the L-z degeneracy
• Testing LCDM with the Growth Function δ(a): Current Constraints
• The 2dF-SDSS LRG and QSO Survey: The LRG 2-Point Correlation Function and Redshift-Space Distortions
• On the growth of linear perturbations
• Observational constraints on the linear fluctuation growth rate
• Next Generation Redshift Surveys and the Origin of Cosmic Acceleration
• The growth of matter perturbations in some scalar-tensor DE models
• Nonlinear growth in modified gravity theories of dark energy
• WMAP5 constraints on the unified model of dark energy and dark matter
• Modified Chaplygin Gas as a Unified Dark Matter and Dark Energy Model and Cosmic Constraints
• A mathematical analysis of the evolution of perturbations in a modified Chaplygin gas model

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• Discriminating dark energy models by using the statefinder hierarchy and the growth rate of matter perturbations
• Scalar perturbations in the late Universe: viability of the Chaplygin gas models
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• Discriminating among cosmological models by data-driven methods
• Thermodynamics of Modified Chaplygin-Jacobi Gas and Modified Chaplygin-Abel Gas: Stability Analysis and Observational Constraints
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