Publication: FRW Cosmology with the Extended Chaplygin Gas
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Wiley
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Abstract
We propose extended Chaplygin gas equation of state for which it recovers barotropic fluid with quadratic equation of state. We use numerical method to investigate the behavior of some cosmological parameters such as scale factor, Hubble expansion parameter, energy density, and deceleration parameter. We also discuss the resulting effective equation of state parameter. Using density perturbations we investigate the stability of the theory.
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High Energy Physics - Theory, High Energy Physics - Phenomenology, Observational and experimental questions in relativity and gravitational theory, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), Physics, QC1-999, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, Relativistic cosmology