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Variable Chaplygin Gas: Constraints from CMBR and SNe Ia

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arxiv astro-ph/0508491 v3 pith:C3DMJV2M submitted 2005-08-23 astro-ph

classification astro-ph
keywords chaplyginmodelvariablecmbrdatalocationcompatibleconstants
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abstract

We constrain the parameters of the variable Chaplygin gas model, using the location of peaks of the CMBR spectrum and SNe Ia ``gold '' data set. Equation of state of the model is $P=-A(a)/\rho$, where $A(a)=A_0 a^{-n}$ is a positive function of the cosmological scale factor $a$, $A_0$ and $n$ being constants. The variable Chaplygin gas interpolates from dust-dominated era to quintessence dominated era. The model is found to be compatible with current type Ia Supernovae data and location of first peak if the values of $\Omega_m$ and $n$ lie in the interval $[0.017,~0.117]$ and $[-1.3,~2.6]$ respectively.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Power-Law and Logarithmic Entropy-Corrected Ricci Dark Energy in a Non-Flat FRW Universe with Viscous Interaction

    gr-qc 2025-08 reject novelty 4.0 of 10

    Analytic expressions are derived, with algebra errors, for two entropy-corrected Ricci dark energy models and their formal correspondence to Chaplygin gas, Yang-Mills, and NLED scalar field models.

  2. Scalar Field Reconstructions of Holographic Dark Energy Models with Applications to Chaplygin Gas, DBI, Yang-Mills, and NLED Frameworks

    gr-qc 2025-09 reject novelty 3.0 of 10

    A catalogue of analytic expressions equating two holographic dark energy models with Chaplygin gas, DBI, Yang-Mills and NLED scalar fields, built from standard reconstruction identities.

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