Phase-space analysis of interacting phantom cosmology

We perform a detailed phase-space analysis of various phantom cosmological models, where the dark energy sector interacts with the dark matter one. We examine whether there exist late-time scaling attractors, corresponding to an accelerating universe and possessing dark energy and dark matter densit...

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Bibliographic Details
Published in:arXiv.org 2009-03
Main Authors: Xi-ming, Chen, Gong, Yungui, Saridakis, Emmanuel N
Format: Article
Language:English
Subjects:
Astronomical models
Cosmology
Dark energy
Dark matter
Universe
Online Access:Get full text
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Summary:We perform a detailed phase-space analysis of various phantom cosmological models, where the dark energy sector interacts with the dark matter one. We examine whether there exist late-time scaling attractors, corresponding to an accelerating universe and possessing dark energy and dark matter densities of the same order. We find that all the examined models, although accepting stable late-time accelerated solutions, cannot alleviate the coincidence problem, unless one imposes a form of fine-tuning in the model parameters. It seems that interacting phantom cosmology cannot fulfill the basic requirement that led to its construction.
ISSN:2331-8422
DOI:10.48550/arxiv.0812.1117