论文标题
剖析动力学耦合典型：现象学和观察测试
Dissecting kinetically coupled quintessence: phenomenology and observational tests
论文作者
论文摘要
我们研究了一个相互作用的暗能量模型，该模型允许标量场的动力学项通过幂律相互作用将其搭配到暗物质。该模型的特征是在早期缩放溶液中缩放溶液，这是减轻巧合问题的高度兴趣，然后是一段加速扩张的时期。我们讨论了背景进化和线性标量扰动的现象学，并确定了宇宙微波背景上黑暗扇区中耦合的可测量特征，镜头潜在的自动相关和物质功率谱。我们还使用宇宙微波背景温度，极化和镜头，重型声音振荡和超新星的数据进行参数估计分析。我们发现，由参数$α$调节的黑暗扇区之间耦合的强度被限制为$ 10^{ - 4} $的订单。模型选择分析并未揭示$λ$ CDM与动力学模型之间的统计偏好。
We investigate an interacting dark energy model which allows for the kinetic term of the scalar field to couple to dark matter via a power-law interaction. The model is characterised by scaling solutions at early times, which are of high interest to alleviate the coincidence problem, followed by a period of accelerated expansion. We discuss the phenomenology of the background evolution and of the linear scalar perturbations and we identify measurable signatures of the coupling in the dark sector on the cosmic microwave background, the lensing potential auto-correlation and the matter power spectra. We also perform a parameter estimation analysis using data of cosmic microwave background temperature, polarisation and lensing, baryonic acoustic oscillations and supernovae. We find that the strength of the coupling between the dark sectors, regulated by the parameter $α$, is constrained to be of order $10^{-4}$. A model selection analysis does not reveal a statistical preference between $Λ$CDM and the Kinetic model.
