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arXiv · 1306.1910

Dark radiation from a unified dark fluid model

Chao-Qiang Geng·Lu-Hsing Tsai·Xin Zhang
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Abstract

We present a unified dark fluid model to describe the possible evolutionary behavior of $\Delta N_\mathrm{eff}$ in dark radiation. This model can be viewed as an interacting model for the dark sectors, in which dark matter interacts with dark radiation. We show that the evolution of $\Delta N_\mathrm{eff}$ can be nicely explained without some drawbacks, such as the blowup of $\Delta N_\mathrm{eff}$ and the non-vanishing interaction at the late time.

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Chao-Qiang Geng, Lu-Hsing Tsai, Xin Zhang. 2013-06-08. Dark radiation from a unified dark fluid model. https://doi.org/10.1093/ptep/ptu072

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