Dark Energy Phenomenon from Backreaction Effect

Yan-Hong Yao,Xin-He Meng

Fig. 2 (Color online) The $1\sigma$, $2\sigma$ and $3\sigma$ confidence regions and best fitting point of the free parameters $\Omega_{m}^{\mathcal{D}_0},\Omega_{\mathcal{R}}^{\mathcal{D}_0}$ for the constant backreaction model, along with their own probability density function. The prior for $\Omega_{m}^{\mathcal{D}_0}\varpropto H(0.5-\Omega_{m}^{\mathcal{D}_0})H(\Omega_{m}^{\mathcal{D}_0}-0.1)$, The prior for $\Omega_{\mathcal{R}}^{\mathcal{D}_0}\varpropto H(1.2-\Omega_{\mathcal{R}}^{\mathcal{D}_0})H(\Omega_{\mathcal{R}}^{\mathcal{D}_0}-0.8)$, $H(x)$ is the step function.