论文标题
测试粘性暗能量的状态方程
Testing the equation of state for viscous dark energy
论文作者
论文摘要
考虑了某些具有散装粘度的宇宙学场景。基于与流体动力学相关的一些考虑因素，假定了两个不同状态的状态方程，从而导致幂律和对数有效校正压力。使用来自IA型超新星（Pantheon样本）的最新天文学数据测试模型，Hubble参数$ H（Z）$， 重子声学振荡和宇宙微波背景辐射。与$λ$ CDM模型相比，获得了一些不同的结果，并讨论了它们的生存能力。幂律模型显示出一些适度的结果，这些结果是在散装粘度的负值下实现的，而对数方案与$λ$ CDM模型相比，对数方案提供了良好的合适效果。
Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on some considerations related to hydrodynamics, two different equations of state for dark energy are assumed, leading to power-law and logarithmic effective corrections to the pressure. The models are tested with the latest astronomical data from Type Ia supernovae (Pantheon sample), measurements of the Hubble parameter $H(z)$, Baryon Acoustic Oscillations and Cosmic Microwave Background radiation. In comparison with $Λ$CDM model, some different results are obtained and their viability is discussed. The power-law model shows some modest results, achieved under negative values of bulk viscosity, while the logarithmic scenario provide good fits in comparison to $Λ$CDM model.
