Scaling cosmology with variable dark-energy equation of state

Castro DR, Velten H, Zimdahl W (2012)
Journal of Cosmology and Astroparticle Physics 2012(06).

Journal Article | Published | English

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Interactions between dark matter and dark energy which result in a power-law behavior (with respect to the cosmic scale factor) of the ratio between the energy densities of the dark components (thus generalizing the Lambda CDM model) have been considered as an attempt to alleviate the cosmic coincidence problem phenomenologically. We generalize this approach by allowing for a variable equation of state for the dark energy within the CPL-parametrization. Based on analytic solutions for the Hubble rate and using the Constitution and Union2 SNIa sets, we present a statistical analysis and classify different interacting and non-interacting models according to the Akaike (AIC) and the Bayesian (BIC) information criteria. We do not find noticeable evidence for an alleviation of the coincidence problem with the mentioned type of interaction.
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Castro DR, Velten H, Zimdahl W. Scaling cosmology with variable dark-energy equation of state. Journal of Cosmology and Astroparticle Physics. 2012;2012(06).
Castro, D. R., Velten, H., & Zimdahl, W. (2012). Scaling cosmology with variable dark-energy equation of state. Journal of Cosmology and Astroparticle Physics, 2012(06).
Castro, D. R., Velten, H., and Zimdahl, W. (2012). Scaling cosmology with variable dark-energy equation of state. Journal of Cosmology and Astroparticle Physics 2012.
Castro, D.R., Velten, H., & Zimdahl, W., 2012. Scaling cosmology with variable dark-energy equation of state. Journal of Cosmology and Astroparticle Physics, 2012(06).
D.R. Castro, H. Velten, and W. Zimdahl, “Scaling cosmology with variable dark-energy equation of state”, Journal of Cosmology and Astroparticle Physics, vol. 2012, 2012.
Castro, D.R., Velten, H., Zimdahl, W.: Scaling cosmology with variable dark-energy equation of state. Journal of Cosmology and Astroparticle Physics. 2012, (2012).
Castro, David R., Velten, Hermano, and Zimdahl, Winfried. “Scaling cosmology with variable dark-energy equation of state”. Journal of Cosmology and Astroparticle Physics 2012.06 (2012).
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