Cosmological joint analysis with cosmic growth and expansion rate

The measurements of expansion rate H(z) and the growth fσ8(z) describe evolution universe, both them can constrain cosmological models through data analysis. Due to lack points, these datasets are combined by traditional method (χ2 method) select a best-fitting model. In 2017, Linder proposed joint method, which describes universe H(z)−fσ8 diagram instead redshift z. Compared individual datasets, demonstrated advantages distinguish cosmologies. this paper, we compare significance between Linder’s constraining density parameter ΩM using Akaike Information Criterion (AIC) Bayesian (BIC). result shows that is more significant than method.