论文标题
根据2018 CMB Planck数据，暗能状态的指数方程
An exponential equation of state of dark energy in the light of 2018 CMB Planck data
论文作者
论文摘要
使用针对状态的暗能量方程（称为Gong-Zhang参数化）的指数函数来分析宇宙的动力学。使用宇宙微波背景辐射，宇宙天内时间表，与氢II星系的模量距离，IA型超新星型和Baryon声学振荡的测量以及从关节分析较强的结合，使用宇宙微波的距离，宇宙时间表的距离以及测量较强。宇宙学模型面临$λ$ CDM，观察到关节分析中有$λ$ CDM的有力证据，尽管在数据分开时首选指数模型。基于关节分析，对于在状态方程中显示的特征参数，找到了$ω_0= -1.202^{+0.027} _ { - 0.026} $的值。此外，报告了当前时间的cosmographic参数，其$ q_0 = -0.789^{+0.034} _ { - 0.036} $，$ j_0 = 1.779^{+0.130} _ { - 0.119} 0.644^{+0.011} _ { - 0.012} $。此外，宇宙的年龄估计为$ t_u = 13.788^{+0.019} _ { - 0.019} $ gyrs。最后，如果此模型可以减轻$ H_0 $和$ S_8 $的紧张局势，我们就会进行讨论。
The dynamics of the Universe is analyzed using an exponential function for the dark energy equation of state, known as Gong-Zhang parameterization. The phase space of the free parameters presented in the model is constrained using Cosmic Microwave Background radiation, Cosmic Chronometers, modulus distance from Hydrogen II Galaxies, Type Ia Supernovae and measurements from Baryon Acoustic Oscillations, together with a stronger bound from a Joint analysis. The cosmological model is confronted with $Λ$CDM, observing there is a strong evidence for $Λ$CDM in the Joint analysis although the exponential model is preferred when the data are separated. Based on the Joint analysis, a value of $ω_0 = -1.202^{+0.027}_{-0.026}$ is found for the characteristic parameter presented in the equation of state. Additionally, the cosmographic parameters at current times are reported, having $q_0 = -0.789^{+0.034}_{-0.036}$, $j_0=1.779^{+0.130}_{-0.119}$, and a transition deceleration-acceleration redshift $z_T = 0.644^{+0.011}_{-0.012}$. Furthermore, the age of the Universe is estimated as $t_U = 13.788^{+0.019}_{-0.019}$ Gyrs. Finally, we open a discussion if this model could alleviate the $H_0$ and $S_8$ tensions.
