幂律宇宙学-一个可行的选择
Power law cosmology - a viable alternative
摘要：
幂律宇宙学是由宇宙学尺度因子演化为$t^α$定义的。本文利用超新星遗产巡天（SNLS）的超新星Ia数据和H（z）数据的联合检验，给出了曲率常数为$ k = 0, \pm 1$的$α$的界。我们观察到SNLS和H（z）数据的联合分析支持$α= 1.31^{+0.06}_{-0.05}. It is also interesting to note that an Einstein - de Sitter model $（α = 2/3）$ is ruled out at $ 2 σ水平的开幂宇宙学。
英文摘要：
A power law cosmology is defined by the cosmological scale factor evolving as $t^α$. In this work, we put bounds on $α$ by using the joint test of the SNe Ia data from Supernova Legacy Survey (SNLS) and H(z) data with curvature constant $ k = 0, \pm 1$. We observe that the combined analysis with SNLS and H(z) data favours the open power cosmology with $α= 1.31^{+0.06}_{-0.05}. It is also interesting to note that an Einstein - de Sitter model $(α= 2/3)$ is ruled out at $2σ$ level.
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