On the generalised Chaplygin gas: worse than a big rip or quieter than a sudden singularity?

Abstract

Although it has been believed that the models with generalised Chaplygin gas do not contain singularities, in a previous work we have studied how a big freeze could take place in some kinds of phantom generalised Chaplygin gas. In the present work, we study some types of generalised Chaplygin gas in order to show how different sorts of singularities could appears in such models, in the future or in the past. We point out that: (i) singularities may not be originated from the phantom nature of the fluid, and (ii) if initially the tension of the brane in a brane-world Chaplygin model is large enough then an infrared cut off appears in the past.

19 pages, 6 figures. Discussion expanded and references added. Version to appear in the International Journal of Modern Physics D

References in corpus (11)

• Dynamics of dark energy
• Worse than a big rip?
• Classification of cosmological milestones
• Quantum phantom cosmology
• Avoidance of future singularities in loop quantum cosmology
• LXCDM: a cosmon model solution to the cosmological coincidence problem?
• Quantum cosmology with big-brake singularity
• Hidden past of dark energy cosmological models
• New "Bigs" in cosmology
• Does the Big Rip survive quantization?
• Brane-world cosmology

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