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• W2039504999 abstract "We study the coincidence problem of late cosmic acceleration by assuming that the present ratio between dark matter and dark energy is a slowly varying function of the scale factor. As the dark energy component we consider two different candidates, first a quintessence scalar field, and then a tachyon field. In either case analytical solutions for the scale factor, the field, and the potential are derived. Both models show a good fit to the recent magnitude-redshift supernovae data. However, the likelihood contours disfavor the tachyon field model as it seems to prefer a excessively high value for the matter component." @default.
• W2039504999 created "2016-06-24" @default.
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• W2039504999 date "2005-06-29" @default.
• W2039504999 modified "2023-10-02" @default.
• W2039504999 title "Soft coincidence in late acceleration" @default.
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• W2039504999 doi "https://doi.org/10.1103/physrevd.71.123529" @default.
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