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Large scale structure and the generalised Chaplygin gas as dark energy

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arxiv astro-ph/0307533 v2 pith:5BGKZ2HY submitted 2003-07-30 astro-ph gr-qchep-ph

classification astro-phgr-qchep-ph
keywords growthlargescalestructurechaplygincosmologicaldarklcdm
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The growth of large scale structure is studied in a universe containing both cold dark matter (CDM) and generalized Chaplygin gas (GCg). GCg is assumed to contribute only to the background evolution of the universe while the CDM component collapses and forms structures. We present some new analytical as well as numerical results for linear and non-linear growth in such model. The model passes the standard cosmological distance test without the need of a cosmological constant (LCDM). But we find that the scenario is severely constrained by current observations of large scale structure. Any small deviations of the GCg parameters away from the standard Lambda dominated cosmology (LCDM) produces substantial suppression for the growth of structures.

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Cited by 1 Pith paper

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

  1. Gravitational Bounce from the Quantum Exclusion Principle

    gr-qc 2025-05 reject novelty 5.0 of 10

    A closed collapsing fluid ball with a hypothetical maximum density bounces into exponential expansion, which the authors equate with inflation and dark energy, predicting a small negative curvature.

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