非极小耦合Galileon模型的观测约束
Observational constraints on non-minimally coupled Galileon model
摘要：
作为Dvali-Gabadadze-Porrati（DGP）模型的推广，Galileon理论被用来解释“自加速问题”和“鬼不稳定性问题”。本文推广了Galileon理论，考虑了与引力非极小耦合的Galileon标量。对状态发现器分析、$Om(z)$诊断和模型参数约束进行了研究，发现了$Ω_\text{m0}=0.263_{-0.031}^{+0.031}$、$n=1.53_{-0.37}^{+0.21}$（在$95\%$置信水平下）与$χ^2_{\text{min}}=473.376$的关系。此外，我们表明，由于SNe Ia + BAO数据，我们的模型表现得像一个幻影般的暗能量。
英文摘要：
As an extension of Dvali-Gabadadze-Porrati (DGP) model, the Galileon theory has been proposed to explain the "self-accelerating problem" and "ghost instability problem". In this Paper, we extend the Galileon theory by considering a non-minimally coupled Galileon scalar with gravity. The statefinder analysis, $Om(z)$ diagnostic and constraint the model parameters have been investigate , we find $Ω_\text{m0}=0.263_{-0.031}^{+0.031}$, $n=1.53_{-0.37}^{+0.21}$ (at the $95\%$ confidence level) with $χ^2_{\text{min}}=473.376$. Further we show that due to the SNe Ia + BAO data ,our model behaves like a phantom-like dark energy.
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