论文标题
宇宙学对新的广义chaplygin气模型
Cosmological constrains on new generalized Chaplygin gas model
论文作者
论文摘要
我们使用不同的数据样本组合来研究黑暗能源（DE）宇宙学的新的广义Chaplygin气体（NGCG）模型。使用可用的宇宙学数据，我们基于统计马尔特链蒙特卡洛法对NGCG模型的自由参数进行了约束。然后，我们找到宇宙参数的最佳拟合值和NGCG宇宙学中那些置信区。我们在NGCG模型中计算出的物质密度参数的结果与标准CDM宇宙学的结果非常吻合。我们还发现，模型状态的方程式略微有利于幻影制度。我们表明，在CDM宇宙中出现的低红移观测和高红移观测之间的巨大张力可以预测Hubble常数H 0可以在NGCG模型中减轻。但是，从统计的角度来看，我们的结果表明，标准CDM模型比NGCG宇宙学更适合观察结果。
We use different combinations of data samples to investigate the new generalized Chaplygin gas (NGCG) model in the context of dark energy (DE) cosmology. Using the available cosmological data, we put constraints on the the free parameters of NGCG model based on the statistical Markov chain Monte Carlo method. We then find the best fit values of cosmological parameters and those confidence regions in NGCG cosmology. Our result for the matter density parameter calculated in NGCG model is in excellent agreement with that of the standard CDM cosmology. We also find that the equation of state of DE of the model slightly favors the phantom regime. We show that the big tension between the low- and high-redshift observations appearing in CDM universe to predict the Hubble constant H 0 can be alleviated in NGCG model. However, from the statistical point of view, our results show that the standard CDM model fits the observations better than the NGCG cosmology.
